Not trying to convince you to change your mind, but just for the sake of discussion - It's not something to be afraid of when you're uploading old fights. It doesn't cost those companies nothing, no one but few die-hard fans cares about those fights.
If promoter or TV network wanted to make example of someone - it would of someone who hosts a site which streams live events - particulary PPVs, because that's really costing them money.
Then you have people uploading live fights soon after they happen, that's also something that TV companies try to fight with.
Even with them - worse things that happens is site/files being taken down.
Then what's even bigger issue world-wide is piracy of movies and music.. But old fights, from the 90's, 80's... Just not worth it for nobody. If they can't make profit of it anyway, they won't bother.
When they will start caring, you'll see the same kind of system that they have with recent fights, when they add some sort of watermark to the video that is then detected by a system - it's not possible to upload any of the latest Showtime boxing events to YT - it's automatically taken down and you get a copyright strike on a channel(I tried it). That's far easier than "making example" - any legal sue would be just as much a trouble for promoter as it would be for yourself.
Just my 2 cents, again - not trying to convince you, just discussing the issue and again - you're the men.
