I've been away at a seminar all day, but I've added support for captions under each videoclip. Not at all completed, but it's a start, just spent an hour on it anyways. I'm using txt-files, hence no html-code is interpreted, I wonder if I should use .html and if that gives support for html-tags. I'll try tomorrow, or better yet read some documentation. 
Now I'm going home. Have a nice day!