版本：
文件：
- https://cdn.bootcdn.net/ajax/libs/videojs-background/1.0.7/lib/videojs-Background.js
- https://cdn.bootcdn.net/ajax/libs/videojs-background/1.0.7/lib/videojs-Background.min.js
- https://cdn.bootcdn.net/ajax/libs/videojs-background/1.0.7/videojs-background.js
- https://cdn.bootcdn.net/ajax/libs/videojs-background/1.0.7/videojs-background.min.js