well, i have gotten some decent times in minecraft but i didnt record them... Unfortunately i can't record them bcs its too laggy to play and too laggy to watch. So ive just been left hope less.

You can still do speedruns and enjoy them without recording and submitting them. If the video quality isn't too terrible, you can still submit laggy footage as well. If the footage is actually unwatchable, try installing a performance mod like sodium, and recording with lower quality settings.

Edit: I don't actually know which mods are banned or allowed, so make sure to read the rules, I'm not a minecraft expert

I record my monitor with my phone camera for demanding pc games. The recording quality isn't as good, but at least it's verifiable