Most Useful Greasemonkey Scripts for YouTube
YouTube is the most popular online video-sharing web site. It’s owned by Google. With very active community it has thousands of videos uploaded every day. Also serves millions of video views every day – from almost any part of the world. These scripts can improve your overall YouTube experience to a next level. I recommend you to try them.

To install these scripts you need to have Greasemonkey – Great extension for Mozilla Firefox web browser.
Most Useful Greasemonkey Scripts for YouTube
1.) Videoembed
Automatically adds embedded videos after links to pages like: glumbert, metacafe, google, yahoo, photobucket, youtube, myspace…(and many others) so you can view the video without opening a new page.
2.) Download ANY YouTube Video
This little scripts adds a link on the YouTube, Google Video, Metacafe, MySpace, Break.com and HuaTimes to download viewing videos on your Hard Drive. Downloaded videos are in format .MP4. And may give you better overall quality of the video.
3.) YouTube Lyrics
Adds a lyrics box to the YouTube sidebar under the video informations box. It can search in eleven different lyrics sites and it shows also all the results in a drop down. I have to say that this scripts works surprisingly well. Try it to see lyrics of your favorite songs live on YouTube!
Removes ads and unwanted sections (configurable), allows downloading and resizing videos, displays all comments on video page, expands the description, can prevent autoplay and autodownload, adds a HD (High Definition) select, etc… This script gives your really large amount of options and features to improve your YouTube experience.
5.) YouTube HQ + 720p HD Ultimate
Makes ALL your YouTube videos go to HQ automatically. Configurable: Resize YouTube site design to fit 720p, force low quality. This script also allows you to customize options which enables automatic view of HD videos (instead HQ), and low quality videos for slower internet connections. This Ultimate version are coming with autoplay off and color options.
6.) YouTube Googler
Makes YouTube videos look more like Google Videos. Basically, it puts the comments in a new tab on the side bar, and expands the video frame to take up as much space as possible, just like Google Video. There is no inline search, or popup stats box, all useful YouTube content is now shoved into the right sidebar.
This script was inspired by and is basically a modification of the excellent Flickr “Lights Out” script by Brenton Cleeland. It works with both the new and old YouTube page layouts and simply adds a button labeled “Lights” to the area under the player, where the “Save” and “Share” buttons are. Script works very well, one of my favorites!
