Overstream has a simple concept - add subtitles to videos you find on services like YouTube or Google Video. It basically works like this: you register for an account, grab a video's link, throw it into Overstream, add your subtitles with customizable durations and timings, and save. The how-to tutorial on using the service is remarkably good and gets you subtitling in no time.

Obviously there are a number of things you could use this for - add commentary to a video, supply subtitles in another language, or write personal messages for that special someone. Since you can set whether you want the subtitled video to be public or private, you can unleash your dreams of text on video as you please. And, to make sure your subtitling efforts do not go to waste, you can always import and export subtitles to and from your videos in SRT format.

The number of subbed videos available on the site for browsing is still rather low - so there isn't too much subbed content for you to browse through - but that is likely to change as more people start using the service. Which, considering the large catalog of videos that Overstream is compatible with, is definitely plausible.

[via gHacks]