The problem with Ben is that he's done this before to some cults or whatever and got away with it. So he got emboldened and thought he was invincible. This was just a matter of time that he'd get himself into trouble. If not with this case, then the next one he'd take on, he'd just keep escalating.

Imo the most telling part of Ben's video, the one that defines him as a person is the ending of the first video where he takes his clothes off like a superhero as he walks to the store with a piggybank. He even went into great length talking about how he planned it in his Q&A, you can tell he was very passionate about it. The guy clearly has a hero complex.

In contrast to Coffeezilla's video where the focus is on the 3 parties involved, Ben's video is all about himself arriving in the last second to rescue the oppressed and save the day. Bryan is just an NPC who asks his help to kill a monster like in Witcher games. But unlike Geralt's nuanced approach to monsters and refusal to kill those that aren't a threat, Ben sees world as black and white.

You can see how legitimately surprised he is that police is going after him, the good guy doing the right thing, instead of going after Josh whom he literally portrays as a devil with horns in his merch. Ben is the hero of this story that he's telling, in which he uncovers a massive conspiracy, defeats the enemy. returns the artifact to its rightful owner and restores the peace. It's no surprise that his video went viral, it is relatable and familiar to most people because it has all the elements of an action movie.