Facebook is so popular to watch live boxing streams I just watched the recent match between Casimero and Nghitumhba, there are streamers who know how to live to stream the right way without getting caught and those who do are rewarded by donations, I sometimes make a donation to motivate these streamers from sharing their stream the next time.
You just have to be patient in looking for the best live stream there are so many search results that you have to weed out the best one.
Using Facebook to view livestreaming will consume quite a lot of internet data, so it's more wasteful when compared to subscribing to YouTube or some other streaming applications.
After all, there are lots of livestreams on Facebook and the average picture quality is quite low, it's different when we use paid streaming services.
In the past, I've seen several livestreaming from Facebook, but the image results don't match the wasteful data packet used.
But it's your choice where you prefer to watch streaming.