That second clip in the beginning that Kev said he didn't know what it was is a 3D hologram of the game they're playing. It makes it so your vision itself is the viewing angle of the 'camera' in traditional games.
he plays on purple atm, its a way better fit over nopixel for his style of roleplay, he would definitely enjoy prodigy too, he played prodigy 1.0 but im assuming hes just fully committed to the arcs on purple atm