Sorry for later response, seems like I missed it in all notifications. Regarding PS1 question , I don't know too much myself since I've never really used consoles too much but if it doesn't change anything with how console works it shouldn't invalidate the run in my opinon.
You're free to share your videos of your idea in Discord server, as you can see noone even responded here, people just don't read these forums.
Even if this becomes a thing, place for it isn't on a main board but rather on category extension board since it has some "challange runs" on there. You've been quite specific with no glitching and limiting platform to PS1 only, is there any reason why someone wouldn't want to do a glitched or PC run? Video is required everywhere, no matter of what you're running, it's a game rule. I wouldn't be personally interested in running it myself since I think i'd find handstands irritating me after a few times (but that's irrelevant here), but I'd prefer to not make the category unless there's already some solid amount of runs. If it will be only you running this there is no point in creating a board that will have only 1 run; having a board isn't something what makes your run valid or invalid. There's already a lot of emptiness across all boards, creating more categories for just 1 run will just multiply it. Feel free to record this run and share it on Youtube, Tomb Runner discord etc. and maybe someone else will get interested in it, since not a lot of people read this forum.
Answer to this question has been provided on TR2 forum.