How I Download YouTube Videos On Firefox and Chrome using Greasemonkey Userscript

I just discovered a Greasemonkey Userscript that downloads YouTube videos as MP4. This cross-browser script adds an option to download YouTube videos as MP4 and FLV files. The script is working perfectly on my Firefox 7 and Chrome Browser.

Unlike many other scripts, this script downloads the videos directly from YouTube and doesn't connect to any other site.  The script works in Firefox, Google Chrome, Opera, Safari and Internet Explorer browsers.

The script works in:
If you want to install it to Firefox, make sure you have installed Greasemonkey and Greasemonkey MUST be enabled before installing the Userscript.

After downloading videos, you can play them using free applications like:
  • VLC (Windows, Mac, Linux / play both MP4 and FLV videos) - recommended video player
  • Windows Media Player 12 for Windows 7 (play only MP4 videos)
  • iTunes and QuickTime Player (Windows, Mac / play only MP4 videos)
  • video players for mobile devices (for example, MP4 360p videos can be watched on an iPhone, iPod Touch and on most Android phones, while MP4 720p videos can be watched on an iPad)

I hope this helps...

Feel free to use the comment form if you have contributions to make or questions to ask.



  1. i just installed it to my Chrome and its working perfectly. please, keep sharing such useful scripts. thanks

  2. Thanks for the confirmation. I will keep trying my best in sharing such scripts.

  3. just tried it out.......thanks

  4. Richard10/19/2011

    I tried downloading it on firefox but this is the message I got: "Not available for Firefox 8.0".

  5. Just try earlier versions of Firefox, it will work. Guess they are yet to be upgraded so as to work with Firefox 8.


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