They ignore the TOS of YouTube and use different methods which we are aware of. Again, we do not condone nor perform workarounds like other bots do.
There are many changes happening currently as well. With the pressure on copyright violations and the Twitch CEO sending out a communication to streamers about the use of copyrighted material on their service and how it pertains to Article 13 and actions they may have to take, and even saying quite clearly, “we support reform and rights holders’ ability to be compensated for their work.” it stands out to me at least that the streaming services are looking to take this very seriously as well.
Quite honestly, it would not surprise me if YouTube is enacting more filters as well. As indicated above, error 150 is being thrown from the Player itself.
My prediction is that services will be pressured further to take additional steps, such as Facebook just terminating a stream, I was reading on this earlier today in fact, when audio is flagged as copyrighted. The time is coming, I believe, where people will have to license music (I pay to license music for my stream) just like a radio station, restaurant, or any other service that provides ambient background noise.
While I do appreciate the inconvenience this may cause, the content creators and those enforcing copyright violations are within their rights to dictate the use of their creation. It has been something that has been mostly ignored for years. Now with more media attention being given to the matter though, I believe the game is changing.