Just saw the notification for this in my Youtube Studio. For now it seems as if this setting is turned off by default, but for anyone like myself who uploads videos to Youtube, I recommend checking that they don’t decide to toggle this on for you in the future.
I have a YouTube channel as well, and also got notified about this.
The setting is disabled by default, so I don’t have a particularly large problem with it. But that might also be because I’m in the EU.
Surprisingly I’m in the US and it’s off by default, at least for now. They’ll toggle it on then claim it was an accident after they make a couple billion dollars.