I'm looking for information regarding broadcast video formats as it relates to a specific project I am working on (BTW - all my experience is in web & print).
What I would like to do is develop a system that will allow for the "tagging" of broadcast commercial advertisements. For example, imagine an ad from an auto maker, and at the end, in the last 4 or 5 seconds, there is information for the local car dealer selling their cars.
Ideally, this tagging would be done by the dealers themselves. They would log into this system, select an ad, tag it with their personal information, preview it, then send it off to the appropriate party.
I'm exploring the idea of doing this with Flash, where I would put a Flash "wrapper" around the ad video, using Flash to composite the custom information onto the video, and then export into a format appropriate for broadcast use.
So... ideas? At least some info on what file formats are commonly used as a start?