Often, we wish that YouTube provided a built-in and easy way for slowing down the videos, so that we could get a better look into that dance tutorial, get a good look at the funny mallu dance or how to learn to moon walk like Michael Jackson. Also, it would have been really useful if there was a mechanism to increase the speed of video playback so that videos like this one, will steal only less time from your life.
The company called Enounce made a utility just for this purpose. The Enounce MySpeed™ Plug-In for YouTube is utility for Windows XP and Vista, which after installation, runs in your system tray. Whenever you visit a YouTube video page (in fact any page that contains a flash video), it shows a little slider using which you can change the video playback speed.
1.0 is the normal playback speed. Set the slider to anything less than 1.0 and you can slow down the video. Taking the slider above 1.0, increases the speed of video playback. A very good feature is that this utility doesn’t distort the audio even at high playback speeds. It eats less memory (about 7 Mb) and will not hog your system.
Windows XP or Vista
Internet Explorer 6 or 7 or Firefox 2 or 3 (Google Chrome, Safari and Opera works, but is experimental).
Flash 9 or 10.
Non GPL. EULA