Yeah, most of the detailed explanations are on his main channel: https://www.youtube.com/user/pannenkoek2012/videos

Discovering how to gain enough speed to clip into modulo copies of the level is one thing, but extending that and finding surfaces that can deflect you in useful directions is a totally different level of commitment. (Also I'm curious how he managed to create the relative view--did he hack the ROM to fix that? I'm sure he mentions it somewhere.)