I am desperate to find the name of this brick
Looks pretty much like this part (tilted by 90°):

Brick Modified 2 x 2 with Pin Hole, Rotation Joint Socket
I recognized it by the small sloped parts next to the cylinder.
But apparently, this part was never produced in yellow. When looking closely at the pictures, the yellow has a different tone than the other yellow parts next to it. I think it might have been repainted.