Would having proof by an end-level screenshot of the time work? I don't think that can be hacked through save data editing.

New categories most likely will not be added to this leaderboard, but you can obviously run anything you want to.

Well the game is gyro by default so you would have to switch to stick which would take a couple seconds. I've only used gyro and all the top runners do so as well, but stick may work fine if you're used to it.

if its not like a top 3 time then you can submit it without video, just submit like a picture of your splits instead of a video

Yes, we also don't have time to go through all the IL wrs to make sure they have a video. If you're not already I would suggest joining the discord and if you see anything against the rules just @ one of the mods.

You only need a video if you have like a top 10 time. Otherwise you can just submit a picture of your splits. You can also use a phone as a timer and there are split apps for them as well.