I thought it was a bug, but then I realised this is a thing youtube are doing and it's fucking awful.
Edit: double checked and because they moved the layout the Unhook extension isn't working properly anymore to hide this obnoxious crap :(
Edit 2: That's hilarious, they seem to have borked the whole site at least for me with this change.
I know I tried watching the new Joker trailer and it hit me with a trigger warning that I had to confirm, my first time seeing that.
The world is full of flimsy faggots and instead of bullying them until they kill themselves we give them positions of power on popular video sites.