我们可以通过视频图层来加载视频。视频图层包含一个layer.player对象，它是用来控制视频的。浏览器支持很多种视频，包括带有alpha通道的动画解码。

A videoLayer loads a video. VideoLayers have a layer.player object to control the video. The browser supports many different types of video, including the Animation codec that supports alpha channels.

videoLayer.video <string>

给视频图层设置播放源。

Sets the video URL for the video layer.

# 创建时设置
layerA = new VideoLayer
    video: "hello.mp4"
​
# 创建后改变
layerA.video = "bye.mp4"

videoLayer.player <object>

视频播放器的播放器对象。通过这个对象你可以控制视频，还可以监听视频播放、暂停等事件，点击这里查看所有支持的方法和属性。

Player object for the video layer. Allows you to control the video and listen for playback events. See this overview of all video methods and properties.

# 创建时设置播放源
layerA = new VideoLayer
    video: "hello.mp4"
​
# 允许自动播放
layerA.player.autoplay = true
​
# 播放视频
layerA.player.play()
​
# 跳到第 5 秒
layerA.player.fastSeek(5)
​
# 监听暂停事件
Events.wrap(layerA.player).on "pause", ->
    print "Video paused"