Sounds like a novel idea, honestly. Basically, a multi-layered video/presentation format. PDF would make a nice layer to that, being able to change slides bas

Sounds like a novel idea, honestly. Basically, a multi-layered video/presentation format. PDF would make a nice layer to that, being able to change slides based on the timeline of the feed... or even change the slide manually, and it navigates the timeline to that point.