Userscripts.org

Pops up a confirmation box before you leave a page so you don't accidentally leave a video you're watching

Pick a user, and this script will automatically watch random videos from that user until you tell it to stop via user script command

Adds a button above the player to reload it

Get direct link for embedded videos from different video sites.

Pauses the video when you click anywhere on it

Make YouTube more like Google Video

add button to download video from vkontakte.ru ($Revision: 1.13 $)

Adds a few nifty Youtube enhancements.

Removes the video ads and fixes the video player so that you can view trailers in fullscreen, pause, seek/rewind. Enjoy!

Quick enter, big screen, no ads, manual autoplay setting and more... check it out!

Detaches video and places it in a movable window.

Creates a link to download Adultism videos (.flv format)

Click a button to stop the video's loading and playback and click it again to start it over

View full version of any posts on Tumblr

Adds a link below an embedded YouTube video to the YouTube page on which the YouTube video is hosted.

为豆瓣(douban.com)、时光网(mtime.com)等影评网站的电影增加谷歌视频、土豆、迅雷等搜索。

Adds a link to embedded videos to display them in an external popup window, so you can read the thread while having the video up elsewhere

Flash video resizer for the live work sessions of the National Assembly of France.

shows the direct link to the video on mail.ru Just click right button and "save the object as" Показывает прямую ссылку на видео с mail.ru Тыкните правой кнопкой на ссылку и "сохранить объект как"

DEFUNCT! 请使用令人发指视频搜索 http://userscripts.org/scripts/show/44089 ，支持更多的影评和视频分享站点！ 为豆瓣(www.douban.com)的电影增加谷歌视频、土豆、迅雷等搜索。

Provides a three thumbnail slideshow preview of text links to YouTube videos.

优化了优酷的视频播放页面

On the reddit site, movies are no longer shown between the articles list when you click 'watch' but are placed on top of it. Movie box is *draggable*.

Adds &fmt=18 to the url for high quality but not if any &fmt=x already exist and adds &fmt=18 to all the links

YouTube's player size never increases

Add download links for space.tv.cctv.com

Provides useful links to search engines based on the page that you're viewing or the search that you're performing.

Replaces the Flash-based video player with a HTML5 video tag referring to the Ogg Theora version of the video. Works great if you have Firefox^WShiretoko 3.1 and are a free software maniac.

DEFUNCT! 请使用令人发指视频搜索 http://userscripts.org/scripts/show/44089 ，支持更多的影评和视频分享站点！ 为中国影视库(www.mdbchina.cn)的影片列表增加谷歌视频、土豆、迅雷等视频搜索链接。

Adds a link to download the FLV file under every video in Youtube. Make sure that you name the video file 'something.flv'(The extension must be 'flv')