SM64 as I remember it.
Digital Circus Ep 2 is OUT:    • A Very Special Digital Circus Song  
ALSO all the DC characters are finally plushies: http://digitalcircus.store

Big credit to @AndratVA for the Mario Kart 64 tpose mod seen at 1:42 and ‪@Unreal64‬ for the gameplay recording seen in the video! :)

And credit to DanGPTV for the shotgun sm64 mod seen at 7:24