Mark video as demo.
diff --git a/docs/docs/components/video.md b/docs/docs/components/video.md
index 5f037b5..7917a2e 100644
--- a/docs/docs/components/video.md
+++ b/docs/docs/components/video.md
@@ -1,14 +1,15 @@
-# <video>
-
-## Summary
+# Summary
+::: danger
+You should consider `<video>` as demo purpose, and re-implement it your favourite video library.
+:::
The video component can be used to embed video content in a Weex page.
-## Child Components
+# Child Components
A `text` is the only valid type of child component.
-## Attributes
+# Attributes
* **src**, string. The URL of the video to embed.
* **play-status**, string. Valid options are 'play' | 'pause'. Use it to control video's play status. Default value is `pause`。
@@ -16,18 +17,18 @@
* **poster**, string, <Badge text="v0.18+ & iOS" type="warning"/>. Post image URL of this video if any.
* **controls**, string, <Badge text="v0.19+" type="warning"/>. If set to `nocontrols`, native video component will hide its play-back control panel.
-## Styles
+# Styles
* **common styles**. support [common styles](../styles/common-styles.html).
-## Events
+# Events
* **start** Triggered when playback state is Playing.
* **pause** Triggered when playback state is Paused.
* **finish** Triggered when playback state is Finished.
* **fail** Triggered when playback state is Failed.
-## Example
+# Example
```html
<template>
diff --git a/docs/zh/docs/components/video.md b/docs/zh/docs/components/video.md
index 15597cc..c1f03c7 100644
--- a/docs/zh/docs/components/video.md
+++ b/docs/zh/docs/components/video.md
@@ -1,14 +1,15 @@
-# <video>
-
-## 简介
+# 简介
+::: danger
+Weex中内置的`<video>`组件一般只做demo用途，在你的App中，你应该用你喜欢的视频库重新实现video组件。
+:::
Video 组件用于在页面中嵌入视频内容。
-## 子组件
+# 子组件
`text` 是唯一合法的子组件。
-## 属性
+# 属性
* **src**, string. 内嵌的视频指向的URL。
* **play-status**, string. 可选值为 `play` | `pause`，用来控制视频的播放状态，`play` 或者 `pause`，默认值是 `pause`。
@@ -16,18 +17,18 @@
* **poster**, string, <Badge text="v0.18+ & iOS" type="warning"/>. 指定视频首图的图片链接。
* **controls**, string, <Badge text="v0.19+" type="warning"/>. 可选值为 `controls` | `nocontrols`，控制视频播放组件是否显示回放控制面板，默认会显示，当指定为 `nocontrols` 时不显示回放控制面板。
-## 样式
+# 样式
* **通用样式** 支持所有[通用样式](../styles/common-styles.html)。
-## 事件
+# 事件
* **start** 当 playback 的状态是 Playing 时触发。
* **pause** 当 playback 的状态是 Paused 时触发。
* **finish** 当 playback 的状态是 Finished 时触发。
* **fail** 当 playback 状态是 Failed 时触发。
-## 示例
+# 示例
```html
<template>
