1. audio & source
2. video & source
3. src & preload &
4. poster & loop &control
5. 指定宽度和高度
6. networkState & currentStr
7.
1. audio & source
2. video & source
3. src & preload &
4. poster & loop &control
5. 指定宽度和高度
6. networkState & currentStr
7.