Viewer discretion is advised.

[Chase Butler]

It's a partner rating. You can select whether or not the episode has mature content, and YouTube will place that warning at the front of your videos.

Yeah, I've just never seen this warning before a video before

 

[Sinc]

lol i put it on some of my own videos, its just a setting.

 

[GreyBadgerTV]

weird to see it on a Film Riot video... never seen it before though. I guess it makes sense as YouTube becomes more like TV... or vica versa