The developer of this tech demo also worked on porting Resident Evil 2 to Nintendo 64. This was quite the challenge - two discs worth of content had to be made to fit onto a single cart.

In an interview, he describes several engineering heroics that were involved in making everything work: https://hiddenpalace.substack.com/p/hidden-palace-podcast-ep...

I haven't listened to the interview yet but I saw that he also gets a credit for appearing as an NPC in RE:2. Sounds like it was well deserved.