It sounds like they're taking the BBC Detection Van approach of making potential viewers of the feeds and small time pirates wonder if there is some detection technology they don't know about. That will probably work to a degree but these streamers are so pervasive it's hard to see how UFC will make a real dent. Over this year's college football season, not only have I seen many pirate streams pop up on YouTube, but have had YouTube's own recommendation algorithm recommend them to me even though I've never searched for them. Simply being a person who watches legit YouTube channels on the subject of NCAA football was enough to get these streams recommended to me. That's pretty much zero effort piracy enabled by YouTube. Sports organizations can go after YouTube for this kind of thing but that it exists even in a controlled platform like YouTube doesn't bode well for them.