Videomanager is a Web-based video manager. It's not a Youtube/Vimeo clone, it just provides the core functionality of uploading, converting, and displaying videos. Commercial support is also available, as well as enterprise features like distributed rendering, tracking, and live streaming.
Movgrab is a command-line movie downloader for sites like YouTube. It has no dependencies; everything that's needed should be there in the tar.gz package. Movgrab can connect through an HTTP proxy, can output the download to stdout for piping into another program, and can fork into the background to free up the console. When forked into the background, its progress can still be seen in a ps list.
Catharsis.NET.Web.Widgets is an ASP.NET MVC tag library that provides useful social media widgets that be be included on your Web pages. Web widgets are implemented as C# POCO objects that implement System.Web.IHtmlString and provide a convenient fluent interface. Extension methods for System.Web.Mvc.HtmlHelper are provided for ease of rendering. It supports Cackle, Disqus, Facebook, Google, IntenseDebate, Mail.ru, RuTube, Surfingbird, Tumblr, Twitter, Vimeo, VKontakte, Yandex, YouTube, and the VideoJS player.
Catharsis.Grails.Widgets is a Grails 2 tag library that provides useful social media tags to include in Web pages. The following areas are covered : Cackle [Comments, OAuth Login]; Disqus [Comments]; Facebook [Activity Feed, Recommendations Feed, Follow Button, Like Button, Like Box, Send Button, Comments, Facepile, Embedded Post, Embedded Video]; Google [Google Analytics, Google "+1" Button]; IntenseDebate [Comments, Comments Count Hyperlink]; Mail.ru [ICQ On-Site, Like Button, Embedded Video]; RuTube [Embedded Video]; Surfingbird [Like Button]; Tumblr [Follow Button, Share Button]; Twitter [Follow Button, Tweet Button]; Vimeo [Embedded Video]; VKontakte [Comments, Community, Like Button, Subscribe, Embedded Video]; Yandex [Yandex Analytics, Ya Button, Share Button, Embedded Video, Yandex.Money Payment Button, Yandex.Money Donate Form, Yandex.Money Payment Form]; YouTube [Embedded Video].
Minitube is a YouTube application for Mac, Linux, and Windows. With it, you can watch YouTube videos in a new way: you type a keyword, and Minitube gives you an endless video stream. Minitube does not require the Flash Player. It is not about cloning the original YouTube Web interface, but strives to create a new TV-like experience.