If saving YouTube videos as favorites and making your own playlists online with their services isn't enough to quench your thirst for their literal flood of content, TubeSock lets you take things one step further by allowing you to save the videos and even convert them for your iPod. It's a small utility that allows you to enter a YouTube URL or simply a video ID, and it can show you a preview of the movie and offer a couple of saving and export options including H.264, PSP, audio-only and even a plain Flash FLV file. TubeSock can also install a bookmarklet in Safari for speedier delivery, and it can even send exported videos straight into iTunes to complete the ultimate YouTube-to-iPod workflow.
After playing with the demo, I'm impressed. Compression is impressively speedy, and for bonus points it automatically cleans up the Flash file it dowloads once exporting is done.
The demo is limited to exporting only the first 30 seconds of any video until you fork over the $15 registration fee. TubeSock is a Universal Binary and available from stinkbot