I think this has nothing to do with casinos promoting via Youtube channels or being endorsed by famous Youtubers to guarantee that they are not a scam. These Youtubers get paid to stream their casino gambling, and share referral codes just for their extra income.
I sometimes watch live streaming of online gambling Youtubers but I never take their games seriously, because they only play with fake money provided by the casino.
As long as the people watching the influencer are not tempted to register at the casino immediately, they will be safe even if it turns out that the casino is a scam. These people will not try to register before they find out more about the casino to know if the casino is legit or if it will become a scam.
If people like you never take their gambling games seriously, they can avoid scam problems. But if those people are tempted to try the casino because they see that the influencer can win easily from the casino, they will sign up and deposit money to play straight away. That's what will make many people fall deeper into scam casinos. We have to be careful in choosing the casino.