Do I have to play on 60/120 fps? those are the only 2 options when submitting a video. Am I allowed to play 30 or 72?

the only rule regarding fps was that you cant have over 120 fps during your run so you should be fine

I believe you are. I don't know about 72 but you can do 30.

How to do 30fps nam skip in chapter 2

@RonitGoyal there is a guide for it in the document for strategies and glitches, go to the resources tab to find it

you can use 72 fps, i saw a run with it