First, I'm not familiar with him or his channel. In regards to your question, I don't think so. If he gives the guys alcohol or a date-rape drug without their knowledge and forces them to have sex then yes it's rape. If the guys CHOOSE to get drunk and CHOOSE to have sex with him, that's their responsibility.
It's a very dangerous game though. You never know how the "straight" guy will react when he finds out (or realizes) he just had sex with a man.