They've been gone for a year and a half now because he doesn't have the license rights and after three strikes for copyright violation your youtube channel gets taken down. It's a standard development for youtubers really, they get big by using footage that they're technically not allowed to but no one gives a *** because the channel is too small. But once you get to a certain vierwship, the ones who own the copyright smell money and report them.
It's not only the doping videos that are gone, everything else prior to 2021 is deleted as well (except for these new RCS licensed videos from 2017 where he bought the rights).
Now that he has the license rights, where are the call outs to probable doping performances (like he used to do)? Not a good business model to use when trying to cozy up to the rights holders?