[hakfoo]

In the US there were some experiments on delivering high-volume content by broadcasting, say, a 30-second spot which flashed dozens or hundreds of images and you were supposed to record it on videotape and play it back frame-by-frame.

There was one local channel here which pointed a camera at a fishtank while idle; if you wanted a specific data package, you called a number to request it. I think the high-water mark for the concept was a few national ads where they said "we'll broadcast the entire Chevrolet catalogue at the top of the hour, have your VCR ready." The problem being, you had to run a second advertisement to get the audience ready for the first one!