Want to jump to a specific point in a movies timeline on YouTube? Now you can. Just add #t=3m40 to the URL. So for instance, if you were to link to a YouTube video, you could do something like this:
http://www.youtube.com/watch?v=nNVDzUqvQD4#t=0m20
The video will now start 20 seconds into the video. This only works when linking to a YouTube video, this does not work when embedding a video.