I'm researching for a project that would need to send messages and/or have interaction with a user while watching a video full-screen on a website. My understanding was that once Flash (or any of the other programs) start, the browser has no control over the process. I can find little to no information on the possibilities. Would this be possible without having an user install separate software?
Any help is appreciated
Clearly didn't do my homework, have found that this will be nearly impossible: