Userscripts.org

Makes the Youtube search feature behave like Google Instant (works only on the main page)

Enables to move any embedded video (or other objects) to a popup window. To use it, shift-double click on a blank space on the page and select an area which will be highlighted in a red frame that contains a flash video, it will automatically pick...

This script tags every video links on a YouTube page so that they can be downloaded easily -- using the title as the filename. On the watch page, it also shows all the available video formats at the top of the page.

Adds a light switch to YouTube video pages which dims everything except the video.

Circumvents the "is not available in your country" message on Youtube by using a proxy.

Auto-searches lyrics, with autoscroll, Hides ADs, and with an eyecandy interface and customizable themes.

Some tools for Youtube

Anonymizes YouTube Video Streaming with HideMyAss! Proxy

Change page's color scheme to optimize for watching videos. Can toggle on/off with a hotkey

Fixes "add to queue" (quicklist) menu on channel pages (in grid view).

Uses CoDeeN Content Distribution Network to accelerate video performance on YouTube

This hack will eliminate the need of Javascript for playing clips on YouTube site. (Handy if you have NoScript extension on)

Adds links on IMDb pages to (Dutch) external sites.

makes room for script's buttons by removing text from some buttons

Adds a button above the player to reload it

Forces YouTube-Videos to play with the new Player

Add downloadable links in Youtube Page

Changes the way of embedding youtube videos from old 'object' to new 'iframe'

Master Scripts eXecute scheduler. Chrome22.0.1229　Coolnovo2.0.3.55　Sleipnir3.7.4　Iron21.0.1200　Dragon21.1　AvantUltimate2012.181Webkit　 for Opera12.10.1620

Removes unnecessary parameters from links like feature=channel

remove seen videos on new STUPID YouTube homepage layout

Adds a button to Google to allow searching within www.youtube.com. It can be easily modified so that other websites can be searched using the button it adds to Google.

Prevents autoplay. (Alternate)

Убирает рекламу и ненужные разделы (настраивается), позволяет загружать и изменять размер видео, отображает все комментарии на странице видео, расширяет описание, может предотвращать автозапуск и автозагрузку видео, добавляет выбор HD (High Defini...

Shows a fake message box. Used for pranking.

Make YouTube videos play in XBMC from your computer.

Gets right of the footer, copyright, google ads, big frontpage ad, side announcement box, "may not be suitable for minors" warning, and other annoyances.

Colors Youtube videos depending on their ratings.

REPLACE.off - FLASH -zapFlashs IN LINK reverse ; all Zap FLASH in link (em) option

Auto-redirect videos from YouTube, Vimeo, Viddler, and more to Quietube. Now including "pre-direction"!