Do you have access to any type of computer? There's a lot of software to connect phone to PC. Otherwise, just recording your xbox with a phone is completely allowed, I'd reccomend putting your phone between 2 textbooks for stability.

As for games best for Xbox speedruns, I'm not too deep into that community yet, but I do know that Breakdown and The Warriors are always looking for runners.

If you want to run the big stuff, then Battle for Bikini Bottom (BfBB) is a gigantic community.

I suppose there's also always Halo too

I think it was a bot alt or something. I remember an incident with some sort of PrestoMilky before or somethin