I agree with Hatis, world runs would be a bit more interesting.

I feel like pretty much every level has a defined route at this point, so there will be a lot of submissions that are about the same time.

If level runs are added, I think adding ms to them is almost mandatory.

Absolutely! I agree with Chounard, holding a bumper down right after hitting a flag pole sounds great.

Capture device for sure. I use this one which talks directly to OBS.

https://www.amazon.com/dp/B00BA4ILX8/ref=cm_sw_r_cp_apa_i_U09yDb5XXMD2A