Instead of knocking the guy, how about contacting him and giving him a little helpful information.
I've watched and enjoyed many of his videos. I don't recall him ever purporting to be an "expert" on any firearm, BP or otherwise.
He has introduced many viewers to a broad spectrum of firearms, current and historic in an informative and fun way. He enjoys the guns he reviews and can shoot them consistently well.
There are many very poor quality videos out there and some people should definitely be disallowed to make them - poor presentation, poor sound, mumbling, stumbling and generally inept.