Youtube now allows you to link to a specific time of its videos using the t hash parameter.
For example, if you want the video to start at the 1min, 45sec mark then add #t=1m45s to the URL.
http://in.youtube.com/watch?v=1bibCui3lFM#t=1m45sThe same code may also be used when you are embedding a YouTube video into your web pages. You can add the #t parameter to YouTube video URL in the embed code and when someone hits play, the video will buffer (play) from exactly that point.
A neat way to let people skip the intros and other boring parts of a video.
Also see: Skip DVD Trailers and Ads in a movie