Comment by phoboslab

That[1] was James Lambert, who was also responsible for Portal 64[2] and is now developing a completely new N64 game. His Youtube channel is worth a follow.

[1] https://www.youtube.com/watch?v=ha3fDU-1wHk

[2] https://www.youtube.com/watch?v=sAkSHzR-P7M