I'm Pro 2a but YouTube was demonetizing, and even removing some, many firearm videos 1-2 years ago and it had everyone in the firearm community in an uproar and the people screaming the most were the uploaders that had videos along the lines of:
"what happens if I shoot a barbie doll with a 50 cal"
"what happens if I shoot a watermelon full of tanerite"
"what happens if I microwave ammunition" (Demolition Ranch has an entire series of these)
"what happens if I microwave a full ak mag" (Demolition Ranch has an entire series of these)
"what happens if I put the wrong caliber ammunition in a firearm" (Demolition Ranch, also I believe King of Everything did this as well he also was in the news for at least two of his videos and had legal action taken against him for making explosives around the same time)
Like, you aren't teaching people how to safely shoot or reviewing firearms, you're doing stupid stuff that is extremely dangerous and absolutely should not be replicated by viewers at home.
Similarly Cody's Lab was losing it last year or the year before when his account was suspended... after he literally rushed through an airport talking to his phone animatedly about making explosives and --- blowing himself up --- in a previously uploaded prank video, and this year he's been griping about how his videos are being demonetized again... well... yeah... you poured liquid mercury into your mouth and were squirting it through your teeth... and you previously almost blew your finger off when you were whacking home-brew nitro glycerine with a steak knife... and you had the federal agents visit your house in response to when you talked about how to make yellow cake at home and were showing your incredibly poor storage methods for radioactive dust. You aren't being persecuted, Google and/or the authorities are trying to make sure you aren't going to do harm to others or instruct others how to do harm.
I imagine the spirit behind this is more to ban videos like
"hack your girlfriend's phone to install secret tracking apps"
and
"how to hack our neighbors WiFi"
instead of "how to assess vulnerabilities in your network"