YouTube is comming up with channel 2.0.  Have a look at this video to know about the features[youtube=http://www.youtube.com/watch?v=cw-NILysH1w&hl=en&fs=1&]Also you can look here for more details:...

This tutorial will show you how to add up Captions in English as well as native language to Youtube video or better adding a subtitle to Youtube video.This doesn't refers to any doc or something but i guess the first simplest tutorial on the web for this...