That's already an issue with radio vs TV which is where I'm getting the ~10 to 30 second value. Normal cable TV already has a bunch of delay and someone listeni

That's already an issue with radio vs TV which is where I'm getting the ~10 to 30 second value. Normal cable TV already has a bunch of delay and someone listening on the radio is often 15+ seconds ahead of you. This can be disruptive. If that person is at a bar or other gathering they will disrupt the viewing because they will cheer (or not cheer) well ahead of the event so the suspense is gone. I've seen this happen. So given that what you are competing against (cable TV) already has a significant delay I doubt a normal web stream can't reach the same or better latency with just standard HTTP download of video files.