tryhtml5_av_event_progress_html 在线代码实例

 <video id="video1" controls="controls" onprogress="alert('Downloading video')">
  <source src="/statics/demosource/mov_bbb.mp4" type="video/mp4">
  <source src="/statics/demosource/mov_bbb.ogg" type="video/ogg">
  Your browser does not support HTML5 video.
</video>

<p>Video courtesy of <a href="http://www.bigbuckbunny.org/" target="_blank">Big Buck Bunny</a>.</p>