Metal Crotch Guy is a meme that originated on YouTube and was popularized by RayWilliamJohnson in his show =3. The original video depicts a guy in underpants with metal pole attached to his crotch area, which he uses to bang on a metallic fence, while walking towards it with crutches.
The original video made people laugh because of the weirdness and the fact that it was first broadcasted on a TV channel Arte.
In 2015, someone created a Metal Crotch Guy channel, in which they uploaded many remixes and remakes of the original video. Notable ones are: I Feel Good by James Brows and We Will Rock You by Queen. There are many spinoffs on the channel as well, including Metal Crotch Gameplay, prank calls and Hitler speech remakes. The channel is also a origin of Danilo Advencrs (Danilo Adventures) meme which was uploaded under the name of BESTVIDEOEVERMADE.