Support closed captioning formats for videos. For example, see (http://support.google.com/youtube/bin/static.py?hl=en&topic=2734694&guide=2734661&page=guide.cs).
Below is a chunk of .sbv (there are many other formats, too, the more supported the merrier):
FISHER: All right. So, let's begin.
This session is: Going Social
with the YouTube APIs. I am
and this is Johann Hartmann,
we're presenting today.