WARNING! This website is no longer actively maintained. It is an archive of 2 years work by Doug Belshaw who now blogs at dougbelshaw.com...
BubblePLY allows you to edit videos from Google Video, YouTube, etc. and add thought bubbles or speech bubbles to them. I can see this being useful for interpretations exercises in History and other subjects - if you had the requisite hardware and permissions… 
There’s an example here - although I think it has potential beyond the ‘funny video’ one given there! (via TechCrunch)
Popularity: 7% [?]
I think you are right.
this thing has a lot of potential for other things as well.
This is Ilan from BubblePLY.com. I would like to firstly thank you for your post and comments.
Did you know that besides offering the ability to layer bubbles on top of a video, BubblePLY can also be used to add subtitles, closed captioning and informative notes etc.? We at BubblePLY would like to invite you and your readers to experiment with us to see how many other interesting ways BubblePLY can be used. If you're having trouble embedding our PLYviewer into your site, please check our FAQs (link - http://www.bubbleply.com/help.aspx). Finally, if you have any comments or questions please e-mail us: