I'm not a programmer, but from what I've read video in HTML5 relies on the browser for the playbar. Flash video wraps the video in a "skin" which has a playbar. That whole thing is then placed on the page.
videojs looks interesting. It looks like it's interjecting itself between the video and the browser to provide the player functions. I don't know how that would be inserted into the Captivate project. The code would have to be in the html output <head> and <body>.
