diff --git a/$index.ts b/$index.ts
index 65de40c..0d972c1 100644
--- a/$index.ts
+++ b/$index.ts
@@ -19,6 +19,7 @@ import { $Textarea } from "./lib/node/$Textarea";
 import { $Util } from "./lib/$Util";
 import { $HTMLElement } from "./lib/node/$HTMLElement";
 import { $Async } from "./lib/node/$Async";
+import { $Video } from "./lib/node/$Video";
 
 export type $ = typeof $;
 export function $<E extends $Element = $Element>(query: `::${string}`): E[];
@@ -88,6 +89,7 @@ export namespace $ {
         'option': $Option,
         'optgroup': $OptGroup,
         'textarea': $Textarea,
+        'video': $Video,
         'async': $Async,
     }
     export type TagNameElementMapType = typeof TagNameElementMap;
@@ -112,6 +114,7 @@ export namespace $ {
     : H extends HTMLOptionElement ? $Option
     : H extends HTMLOptGroupElement ? $OptGroup
     : H extends HTMLTextAreaElement ? $Textarea
+    : H extends HTMLVideoElement ? $Video
     : $Container<H>;
 
     /**
@@ -142,27 +145,27 @@ export namespace $ {
      * @param handle callback when param `value` is $State object.
      * @returns 
      */
-    export function set<O extends Object, K extends keyof O, V>(
+    export function set<O extends Object, K extends keyof O>(
         object: O, 
         key: K, 
         value: O[K] extends (...args: any) => any 
-            ? (undefined | $StateArgument<Parameters<O[K]>>) 
+            ? (undefined | [$StateArgument<Parameters<O[K]>>]) 
             : (undefined | $StateArgument<O[K]>), 
         handle?: ($state: $State<O[K]>) => any) {
             if (value === undefined) return;
             if (value instanceof $State) {
                 value.use(object, key);
-                if (object[key] instanceof Function) (object[key] as Function)(value)
+                if (object[key] instanceof Function) (object[key] as Function)(...value.value)
                     else object[key] = value.value;
                 if (handle) handle(value);
                 return;
             }
-            if (object[key] instanceof Function) (object[key] as Function)(value);
+            if (object[key] instanceof Function) (object[key] as Function)(...value as any);
             else object[key] = value as any;
     }
     
-    export function state<T>(value: T, options?: $StateOption<T>) {
-        return new $State<T>(value, options)
+    export function state<T>(value: T, options?: $StateOption<T extends $State<infer K> ? K : T>) {
+        return new $State<T>(value, options as $StateOption<T>) as T extends $State<infer K> ? $State<K> : $State<T>;
     }
 
     export async function resize(object: Blob, size: number): Promise<string> {
diff --git a/index.ts b/index.ts
index c90f8dd..ddc9752 100644
--- a/index.ts
+++ b/index.ts
@@ -26,7 +26,7 @@ declare global {
 Array.prototype.detype = function <T extends undefined | null, O>(this: O[], ...types: T[]) {
     return this.filter(item => {
         if (!types.length) return item !== undefined;
-        else for (const type of types) if (typeof item !== typeof type) return false;  else return true
+        else for (const type of types) if (typeof item !== typeof type) return true;  else return false;
     }) as Exclude<O, T>[];
 }
 export * from "./$index";
@@ -47,4 +47,6 @@ export * from "./lib/node/$OptGroup";
 export * from "./lib/node/$Textarea";
 export * from "./lib/node/$Image";
 export * from "./lib/node/$Async";
-export * from "./lib/node/$Document";
\ No newline at end of file
+export * from "./lib/node/$Document";
+export * from "./lib/node/$Media";
+export * from "./lib/node/$Video";
\ No newline at end of file
diff --git a/lib/$NodeManager.ts b/lib/$NodeManager.ts
index 2af381e..48c4325 100644
--- a/lib/$NodeManager.ts
+++ b/lib/$NodeManager.ts
@@ -3,32 +3,33 @@ import { $Node } from "./node/$Node";
 import { $Text } from "./node/$Text";
 
 export class $NodeManager {
-    $container: $Container;
-    $elementList = new Set<$Node>
+    readonly $container: $Container;
+    readonly childList = new Set<$Node>
     constructor(container: $Container) {
         this.$container = container;
     }
 
-    add(element: $Node | string) {
-        if (typeof element === 'string') {
-            const text = new $Text(element);
-            this.$elementList.add(text);
-            (text as Mutable<$Node>).parent = this.$container;
-        } else {
-            this.$elementList.add(element);
+    add(element: $Node, position = -1) {
+        if (position === -1 || this.childList.size - 1 === position) {
+            this.childList.add(element);
             (element as Mutable<$Node>).parent = this.$container;
+        } else {
+            const children = [...this.childList]
+            children.splice(position, 0, element);
+            this.childList.clear();
+            children.forEach(child => this.childList.add(child));
         }
     }
 
     remove(element: $Node) {
-        if (!this.$elementList.has(element)) return this;
-        this.$elementList.delete(element);
+        if (!this.childList.has(element)) return this;
+        this.childList.delete(element);
         (element as Mutable<$Node>).parent = undefined;
         return this;
     }
 
     removeAll(render = true) {
-        this.$elementList.forEach(ele => this.remove(ele));
+        this.childList.forEach(ele => this.remove(ele));
         if (render) this.render();
     }
 
@@ -36,8 +37,8 @@ export class $NodeManager {
         const array = this.array
         array.splice(array.indexOf(target), 1, replace);
         target.remove();
-        this.$elementList.clear();
-        array.forEach(node => this.$elementList.add(node));
+        this.childList.clear();
+        array.forEach(node => this.childList.add(node));
         return this;
     }
 
@@ -60,7 +61,7 @@ export class $NodeManager {
         }
     }
 
-    get array() {return [...this.$elementList.values()]};
+    get array() {return [...this.childList.values()]};
 
     get dom() {return this.$container.dom}
 }
\ No newline at end of file
diff --git a/lib/$State.ts b/lib/$State.ts
index 92d9458..9d48a3b 100644
--- a/lib/$State.ts
+++ b/lib/$State.ts
@@ -2,28 +2,35 @@ export interface $StateOption<T> {
     format: (value: T) => string;
 }
 export class $State<T> {
-    readonly value!: T;
+    protected _value!: T | $State<T>;
     readonly attributes = new Map<Object, Set<string | number | symbol>>();
+    readonly linkStates = new Set<$State<T>>;
     options: Partial<$StateOption<T>> = {}
     constructor(value: T, options?: $StateOption<T>) {
         this.set(value);
         if (options) this.options = options;
     }
-    set(value: T) {
-        (this as Mutable<$State<T>>).value = value;
+    set(value: T | $State<T>) {
+        this._value = value;
+        if (value instanceof $State) value.linkStates.add(this as any);
+        this.update();
+        this.linkStates.forEach($state => $state.update());
+    }
+
+    protected update() {
         // update element content for eatch attributes
         for (const [node, attrList] of this.attributes.entries()) {
             for (const attr of attrList) {
                 //@ts-expect-error
                 if (node[attr] instanceof Function) {
                     //@ts-expect-error
-                    if (this.options.format) node[attr](this.options.format(value))
+                    if (this.options.format) node[attr](this.options.format(this.value))
                     //@ts-expect-error
-                    else node[attr](value)
+                    else node[attr](this.value)
                 }
                 else if (attr in node) {
                     //@ts-expect-error
-                    node[attr] = value
+                    node[attr] = this.value
                 }
             }
         }
@@ -56,6 +63,10 @@ export class $State<T> {
         }
         return data;
     }
+
+    get value(): T {
+        return this._value instanceof $State ? this._value.value as T : this._value;
+    }
 };
 
-export type $StateArgument<T> = T | $State<T> | undefined;
\ No newline at end of file
+export type $StateArgument<T> = $State<T> | undefined | (T extends (infer R)[] ? R : T);
\ No newline at end of file
diff --git a/lib/node/$Container.ts b/lib/node/$Container.ts
index 4706276..ac4ba9b 100644
--- a/lib/node/$Container.ts
+++ b/lib/node/$Container.ts
@@ -20,18 +20,22 @@ export class $Container<H extends HTMLElement = HTMLElement> extends $HTMLElemen
         this.insert(children);
     })}
 
+    private __position_cursor = 0;
     /**Insert element to this element */
-    insert(children: $ContainerContentBuilder<this>): this { return $.fluent(this, arguments, () => this, () => {
+    insert(children: $ContainerContentBuilder<this>, position = -1): this { return $.fluent(this, arguments, () => this, () => {
         if (children instanceof Function) children = children(this);
         children = $.orArrayResolve(children);
+        this.__position_cursor = position < 0 ? this.children.array.length + position : position;
         for (const child of children) {
-            if (child === undefined) continue;
-            if (child instanceof Array) this.insert(child)
+            if (child === undefined || child === null) continue;
+            if (child instanceof Array) this.insert(child, this.__position_cursor);
+            else if (typeof child === 'string') this.children.add(new $Text(child), position);
             else if (child instanceof $State) {
                 const ele = new $Text(child.toString());
                 child.use(ele, 'content');
-                this.children.add(ele);
-            } else this.children.add(child);
+                this.children.add(ele, position);
+            } else this.children.add(child, position);
+            this.__position_cursor += 1;
         }
         this.children.render();
     })}
@@ -61,4 +65,4 @@ export class $Container<H extends HTMLElement = HTMLElement> extends $HTMLElemen
 }
 
 export type $ContainerContentBuilder<P extends $Container> = OrMatrix<$ContainerContentType> | (($node: P) => OrMatrix<$ContainerContentType>)
-export type $ContainerContentType = $Node | string | undefined | $State<any>
\ No newline at end of file
+export type $ContainerContentType = $Node | string | undefined | $State<any> | null
\ No newline at end of file
diff --git a/lib/node/$Media.ts b/lib/node/$Media.ts
new file mode 100644
index 0000000..a3d62cb
--- /dev/null
+++ b/lib/node/$Media.ts
@@ -0,0 +1,106 @@
+import { $State, $StateArgument } from "../$State";
+import { $Element, $ElementOptions } from "./$Element";
+
+export interface $MediaOptions extends $ElementOptions {}
+export class $Media<H extends HTMLMediaElement> extends $Element<H> {
+    constructor(tagname: string, options?: $MediaOptions) {
+        super(tagname, options);
+    }
+
+    autoplay(): boolean;
+    autoplay(autoplay: $StateArgument<boolean>): this;
+    autoplay(autoplay?: $StateArgument<boolean>) { return $.fluent(this, arguments, () => this.dom.autoplay, () => $.set<HTMLMediaElement, 'autoplay'>(this.dom, 'autoplay', autoplay))}
+
+    get buffered() { return this.dom.buffered }
+
+    controls(): boolean;
+    controls(controls: $StateArgument<boolean>): this;
+    controls(controls?: $StateArgument<boolean>) { return $.fluent(this, arguments, () => this.dom.controls, () => $.set<HTMLMediaElement, 'controls'>(this.dom, 'controls', controls))}
+
+    crossOrigin(): string | null;
+    crossOrigin(crossOrigin: $StateArgument<string | null>): this;
+    crossOrigin(crossOrigin?: $StateArgument<string | null>) { return $.fluent(this, arguments, () => this.dom.crossOrigin, () => $.set<HTMLMediaElement, 'crossOrigin'>(this.dom, 'crossOrigin', crossOrigin))}
+
+    get currentSrc() { return this.dom.currentSrc };
+    
+    currentTime(): number;
+    currentTime(currentTime: $StateArgument<number>): this;
+    currentTime(currentTime?: $StateArgument<number>) { return $.fluent(this, arguments, () => this.dom.currentTime, () => $.set<HTMLMediaElement, 'currentTime'>(this.dom, 'currentTime', currentTime))}
+
+    defaultMuted(): boolean;
+    defaultMuted(defaultMuted: $StateArgument<boolean>): this;
+    defaultMuted(defaultMuted?: $StateArgument<boolean>) { return $.fluent(this, arguments, () => this.dom.defaultMuted, () => $.set<HTMLMediaElement, 'defaultMuted'>(this.dom, 'defaultMuted', defaultMuted))}
+
+    defaultPlaybackRate(): number;
+    defaultPlaybackRate(defaultPlaybackRate: $StateArgument<number>): this;
+    defaultPlaybackRate(defaultPlaybackRate?: $StateArgument<number>) { return $.fluent(this, arguments, () => this.dom.defaultPlaybackRate, () => $.set<HTMLMediaElement, 'defaultPlaybackRate'>(this.dom, 'defaultPlaybackRate', defaultPlaybackRate))}
+
+    disableRemotePlayback(): boolean;
+    disableRemotePlayback(disableRemotePlayback: $StateArgument<boolean>): this;
+    disableRemotePlayback(disableRemotePlayback?: $StateArgument<boolean>) { return $.fluent(this, arguments, () => this.dom.disableRemotePlayback, () => $.set<HTMLMediaElement, 'disableRemotePlayback'>(this.dom, 'disableRemotePlayback', disableRemotePlayback))}
+
+    get duration() { return this.dom.duration }
+    get ended() { return this.dom.ended }
+    get error() { return this.dom.error }
+    
+    loop(): boolean;
+    loop(loop: $StateArgument<boolean>): this;
+    loop(loop?: $StateArgument<boolean>) { return $.fluent(this, arguments, () => this.dom.loop, () => $.set<HTMLMediaElement, 'loop'>(this.dom, 'loop', loop))}
+    
+    mediaKeys(): MediaKeys | null;
+    mediaKeys(mediaKeys: $StateArgument<[MediaKeys | null]>): this;
+    mediaKeys(mediaKeys?: $StateArgument<[MediaKeys | null]>) { return $.fluent(this, arguments, () => this.dom.mediaKeys, () => $.set<HTMLMediaElement, 'setMediaKeys'>(this.dom, 'setMediaKeys', [mediaKeys]))}
+
+    muted(): boolean;
+    muted(muted: $StateArgument<boolean>): this;
+    muted(muted?: $StateArgument<boolean>) { return $.fluent(this, arguments, () => this.dom.muted, () => $.set<HTMLMediaElement, 'muted'>(this.dom, 'muted', muted))}
+
+    get networkState() { return this.dom.networkState }
+    get paused() { return this.dom.paused }
+
+    playbackRate(): number;
+    playbackRate(playbackRate: $StateArgument<number>): this;
+    playbackRate(playbackRate?: $StateArgument<number>) { return $.fluent(this, arguments, () => this.dom.playbackRate, () => $.set<HTMLMediaElement, 'playbackRate'>(this.dom, 'playbackRate', playbackRate))}
+
+    get played() { return this.dom.played }
+    
+    preload(): this['dom']['preload'];
+    preload(preload: $StateArgument<this['dom']['preload']>): this;
+    preload(preload?: $StateArgument<this['dom']['preload']>) { return $.fluent(this, arguments, () => this.dom.preload, () => $.set<HTMLMediaElement, 'preload'>(this.dom, 'preload', preload))}
+
+    preservesPitch(): boolean;
+    preservesPitch(preservesPitch: $StateArgument<boolean>): this;
+    preservesPitch(preservesPitch?: $StateArgument<boolean>) { return $.fluent(this, arguments, () => this.dom.preservesPitch, () => $.set<HTMLMediaElement, 'preservesPitch'>(this.dom, 'preservesPitch', preservesPitch))}
+
+    get readyState() { return this.dom.readyState }
+    get remote() { return this.dom.remote }
+    get seekable() { return this.dom.seekable }
+    get seeking() { return this.dom.seeking }
+    
+    sinkId(): string;
+    sinkId(sinkId: $StateArgument<[string]>): this;
+    sinkId(sinkId?: $StateArgument<[string]>) { return $.fluent(this, arguments, () => this.dom.sinkId, () => $.set<HTMLMediaElement, 'setSinkId'>(this.dom, 'setSinkId', [sinkId]))}
+
+    src(): string;
+    src(src: $StateArgument<string>): this;
+    src(src?: $StateArgument<string>) { return $.fluent(this, arguments, () => this.dom.src, () => $.set<HTMLMediaElement, 'src'>(this.dom, 'src', src))}
+
+    srcObject(): MediaProvider | null;
+    srcObject(srcObject: $StateArgument<MediaProvider | null>): this;
+    srcObject(srcObject?: $StateArgument<MediaProvider | null>) { return $.fluent(this, arguments, () => this.dom.srcObject, () => $.set<HTMLMediaElement, 'srcObject'>(this.dom, 'srcObject', srcObject))}
+
+    get textTracks() { return this.dom.textTracks }
+    
+    volume(): number;
+    volume(volume: $StateArgument<number>): this;
+    volume(volume?: $StateArgument<number>) { return $.fluent(this, arguments, () => this.dom.volume, () => $.set<HTMLMediaElement, 'volume'>(this.dom, 'volume', volume))}
+
+    addTextTrack(kind: TextTrackKind, label?: string, language?: string) { return this.dom.addTextTrack(kind, label, language)}
+    canPlayType(type: string) { return this.dom.canPlayType(type) }
+    fastSeek(time: number) { this.dom.fastSeek(time); return this }
+    load() { this.dom.load(); return this }
+    pause() { this.dom.pause(); return this }
+    async play() { await this.dom.play(); return this}
+
+    get isPlaying() { return this.currentTime() > 0 && !this.paused && !this.ended && this.readyState > 2 }
+}
\ No newline at end of file
diff --git a/lib/node/$Video.ts b/lib/node/$Video.ts
new file mode 100644
index 0000000..f7a1d3c
--- /dev/null
+++ b/lib/node/$Video.ts
@@ -0,0 +1,37 @@
+import { $StateArgument } from "../$State";
+import { $Media, $MediaOptions } from "./$Media";
+
+export interface $VideoOptions extends $MediaOptions {}
+export class $Video extends $Media<HTMLVideoElement> {
+    constructor(options?: $VideoOptions) {
+        super('video', options)
+    }
+
+    disablePictureInPicture(): boolean;
+    disablePictureInPicture(disablePictureInPicture: $StateArgument<boolean>): this;
+    disablePictureInPicture(disablePictureInPicture?: $StateArgument<boolean>) { return $.fluent(this, arguments, () => this.dom.disablePictureInPicture, () => $.set(this.dom, 'disablePictureInPicture', disablePictureInPicture))}
+    
+    height(): number;
+    height(height: $StateArgument<number>): this;
+    height(height?: $StateArgument<number>) { return $.fluent(this, arguments, () => this.dom.height, () => $.set(this.dom, 'height', height))}
+
+    width(): number;
+    width(width: $StateArgument<number>): this;
+    width(width?: $StateArgument<number>) { return $.fluent(this, arguments, () => this.dom.width, () => $.set(this.dom, 'width', width))}
+
+    playsInline(): boolean;
+    playsInline(playsInline: $StateArgument<boolean>): this;
+    playsInline(playsInline?: $StateArgument<boolean>) { return $.fluent(this, arguments, () => this.dom.playsInline, () => $.set(this.dom, 'playsInline', playsInline))}
+    
+    poster(): string;
+    poster(poster: $StateArgument<string>): this;
+    poster(poster?: $StateArgument<string>) { return $.fluent(this, arguments, () => this.dom.poster, () => $.set(this.dom, 'poster', poster))}
+
+    get videoHeight() { return this.dom.videoHeight }
+    get videoWidth() { return this.dom.videoWidth }
+
+    cancelVideoFrameCallback(handle: number) { this.dom.cancelVideoFrameCallback(handle); return this }
+    getVideoPlaybackQuality() { return this.dom.getVideoPlaybackQuality() }
+    requestPictureInPicture() { return this.dom.requestPictureInPicture() }
+    requestVideoFrameCallback(callback: VideoFrameRequestCallback) { return this.dom.requestVideoFrameCallback(callback) }
+}
\ No newline at end of file
diff --git a/package.json b/package.json
index fa25bde..7f68cda 100644
--- a/package.json
+++ b/package.json
@@ -1,21 +1,21 @@
 {
   "name": "elexis",
   "description": "Build Web in Native JavaScript Syntax",
-  "version": "0.2.3",
+  "version": "0.2.4",
   "author": {
     "name": "defaultkavy",
     "email": "defaultkavy@gmail.com",
-    "url": "https://github.com/defaultkavy"
+    "url": "https://git.defaultkavy.com/defaultkavy"
   },
   "repository": {
     "type": "git",
-    "url": "git+https://github.com/defaultkavy/elexis.git"
+    "url": "git+https://git.defaultkavy.com/defaultkavy/elexis.git"
   },
   "module": "index.ts",
   "bugs": {
-    "url": "https://github.com/defaultkavy/elexis/issues"
+    "url": "https://git.defaultkavy.com/defaultkavy/elexis/issues"
   },
-  "homepage": "https://github.com/defaultkavy/elexis",
+  "homepage": "https://git.defaultkavy.com/defaultkavy/elexis",
   "keywords": ["web", "front-end", "lib", "fluent", "framework"],
   "license": "ISC",
   "type": "module"