I once in a while get a nasty comment. Just know it's usually just an angry kid with nothing better to do with their time. I get some crazy comments from kids as young as 10 flexing their meaness. I wouldn't worry about it, but you definitely want to report it regardless of if it's just a silly troll, or something to be more concerned about. Report the user to youtube, then hide them from your channel.
You should also add words that might not also be caught up in the filters like "pistol" "shoot" etc which on their own, wouldn't be much cause for concern, but in context, don't always get caught in the bad words filter.
I have an extensive list to try and make sure those comments can never show up. So for "shoot" I'd also go with the intentional misspelling of "sh00t" because some trolls know their comments won't get through unless they intentionally misspell them.
Funny thing, and not always advised, but when you get weird comments, if they're less aggressive, if you call them out but don't bite back, just say something like "sorry you didn't like the video, but I hope you have a great week regardless
" you SOMETIMES get the kids replying with something like "sorry, I didn't mean to say that, I was just angry" or something like "sorry, my friend/brother/sister stole my phone and left that comment"