Alternate video link to Invidious (YouTube without using YouTube directly): https://yt.artemislena.eu/watch?v=dH1ErhJa3Qo
Banjo Kazooie Gitlab (Source Code): gitlab.com/banjo.decomp/banjo-kazooie
Additionally a written article posted here at discussion:
Would successfully decompiling this game make the process any faster for the sequel, or is it just a manual labor thing?