They may have been planning on putting out a video from each tour, but I think that was still in the era when filming a show "just so we have it on video" was still not feasible without putting out some kind of finished result. Thus, I suspect they ended up not shooting anything on the Signals or Power Windows tours. I think by the 90's, as technology improved, it became easier to at least get something, though I think unless they put something out (which I don't think they did during the 90's), I'm guessing it was closer to the video screen feeds you see from 70's era shows.
I believe I've seen a bit of audience shot footage from teh Signals tour, and I imagine there's some footage of that sort from every tour, but a lot of is very rough, and very incomplete. A lot of times you've got the camera zooming in on a band member, even as something interesting (ie lasers, a film, etc) is very obviously happening. There's a lot of Pink Floyd footage like that from the 87-94 era, where you wish you could slap the guy in the back of the head and yell, "ZOOM OUT, YOU IDIOT!!!".
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