find_html5_video.js

// attempt to fidn the first <video ... tag on the page:

function findFirstVideoTag() {
    var all = document.getElementsByTagName("video");
    if (all.length > 0)
      return all[0];
    else {
        // iframes
     var i, frames;
     frames = document.getElementsByTagName("iframe");
     for (i = 0; i < frames.length; ++i) {
       try { var childDocument = frame.contentDocument } catch (e) { continue }; // skip ones we can't access :|
        all = frames[i].contentDocument.document.getElementsByTagName("video");
        if (all.length > 1)
          return all[0];
     }
     return null;
   }
}

video_element = findFirstVideoTag();
video_element.playbackRate = 3; // triple speed it

with amazon [google chrome OS X] to seek somewhere: b.pause(); b.currentTime = 3; // resumes playback at second 3

play() and pause() maybe after a seek or some thing? sometimes pause() after a seek makes it work?

playbackRate = 3; // triple speed, see also https://github.com/igrigorik/videospeed