DotSub is a video sharing site that encourages its community of users to collaborate in the translation of videos into multiple languages. The site's community can use dotSUB's easy to use tool in order to add subtitles in other languages. The viewer can then select the language to watch the video in — if English, then only English subtitles would be shown. If French, then only the French subtitles would be shown, and so on.
This is a very neat service to consider for those video producers that need assistance having their videos translated into other languages.
Here is a video from their site that has been translated into many different languages: