Well I’m trying to do retro 200cc and I feel like I don’t have proof if I get into the T10 so if it’s ok for MKTV to be allowed I will be glad to hear about it

If you have a phone you could use that to record

Nope, MKTV doesn't show the VS rules or load times so you couldn't prove your RTA time. It also doesn't store more than 12 recent tracks, so you simply can't use it anyway. Just use a phone if you want a cheap recording option.