I've done a marathon Infinity Speedrun.
http://www.archive.org/details/MarathonInfinityI also have the film files if you'd like those. I did it in Marathon Infinity 1.5 for Mac, and the films DO NOT sync in aleph one by the way.
Also, Marathon 1 and it's aleph one port are extremely different in terms of gameplay physics and monster AI. I know, because I've been working on a marathon 1 run for a few years now.
Well, in my case (I am doing a Marathon Durandal run), Aleph One can run the physics of the PC version of Marathon Durandal. As for enemy AI, doesn't seem much different...