I liked a lot of the Ultimate Chimera Hunt videos he did with his friends
There was also this Gmod Murder video (or some kinda gamemode) that i recall where Kevin's game/computer crashed, and James, Aleks, and i think someone else were wondering why he wasn't responding, then suddenly Kevin's voice suddenly cuts in stuttering before completely dying out, James' reaction to that was especially hilarious, but i don't remember what video that was