This was probably due to a spicy joke one of his guests made on a previous podcast. BTCSessions even joked about knowing the exact moment that the video would be demonitized. This is just a guess. I do not recall what the joke was specifically, but even the guy who made it apologized and said to cut it.
If you are to livestream, better to probably do it on a site like Rumble if you are going to even get close to hot button topics and then edit and upload to YouTube. Livestreaming on YouTube is rolling the dice if you cannot control 100% of what is being said.
Sorry this happened, I hope he can get it resolved.