Yep. Looks like they will be banning videos selling conversion kits, or showing how to manufacture full auto. Also hi capacity mags. https://ijr.com/2018/03/1077473-youtube-bans-some-gun-vids/
As for Hickok45. They already took him down once and I'm sure this will be final now. He is popular and the anti gun folk will want to pull him for that reason.