 <p>I think it's unlikely that this is possible using only client-side Flash. In theory maybe it would be possible to simulate playback speed of video by doing manual seeking, but that wouldn't provide for audio. Using Flash 10+, it is now possible to manipulate audio data manually, though that doesn't mean it's possible to manipulate in context of a audio/video stream . (Example: <a href="http://www.kelvinluck.com/2008/11/first-steps-with-flash-10-audio-programming/" rel="nofollow">http://www.kelvinluck.com/2008/11/first-steps-with-flash-10-audio-programming/</a>)</p> <p>If the Google Video player you provided a screen shot of was Flash based, then I think it's very likely they were using a media server to handle playback speed changes. (Just FYI, google at one time had multiple video players available, and not all were Flash based.) Recent versions of Flash Media Server supposedly also support playback speed adjustment. (I couldn't find anything authoritative though, and I don't know if handling of audio is included.)</p> <p>One other thought, just FWIW, HTML5 video includes support for speed adjustment the playbackRate property. Perhaps that will eventually be an option for you.</p>