He also actively shows that not everyone reacts the same. One of his videos is fully based around an innocent man who seems to react differently than the average person and is kept in jail because of it. He makes the point that cops sometimes do read too much into these tells and forget the facts.
If you think that this could somehow be problematic; after watching the channel the only conclusion you can reasonably come to is "if the police suspect me of a crime, shut the hell up and get a lawyer." He is quite clear that the police are way better at psychological games, and the absolute last thing they want you to do is get your lawyer involved. Heck, he shows a cop who murdered someone get caught to show that even cops can't keep up with their own interrogation tactics! This is actively helpful and exactly what anyone under investigation should do.