Wow! Yes, I am interested in that kind of thing. Also a coincidence: me and my brother used to do cooperative 2-player speeed-runs of Doom/Doom2 as part of a t

Wow! Yes, I am interested in that kind of thing. Also a coincidence: me and my brother used to do cooperative 2-player speeed-runs of Doom/Doom2 as part of a thing called "H2HMud". We had a setup which consisted of a fast 486, and a really slow 386. It ran really slowly - about 1/4 normal rate when you woke up a room full of entities. The 486, however, rendered every frame, which meant the person on the fast machine could happily pick every off pixel-perfect, while the slower machine player would do "support" stuff (flip switches). I wondered what the "limit" would be if you could slow it down arbitrarily, and re-stitch, and I guess that's what it looks like in the video you posted. Thanks!