FireDM is a python open source (Internet Download Manager) with multi-connections, high speed engine, it downloads general files and videos from youtube and tons of other streaming websites .
Embedly makes your content more engaging and easier to share
MediaGoblin is a free software media publishing platform that anyone can run. You can think of it as a decentralized alternative to Flickr, YouTube, SoundCloud,
Tubular is a jQuery plugin that lets you set a YouTube video as your page background. Just attach it to your body tag, specify a YouTube video ID and tell it the ID of your content wrapper, and you're on your way.