OK, maybe not old school by MCB standards, but in the realm of "paintball videos" these are the gold standard that we don't have anymore. https://streampb.com/
There's lots of free content, and a paid membership option. I'm not sure what is behind the paywall yet, but I may spring for it and find out. This is associated with the new NPL tournament league trying to get going. I think behind the paywall will be the NPL content when/if that starts.
I know tournament ball doesn't appeal to a lot of the MCB community, but I figured some guys would appreciate it and enjoy the old throwback videos. What are your favorites? Mine are Dementia
and Bring Out Your Dead