Hello.

I want to learn the speedrun of the game but I find quite few guides. Does anyone have a guide playlist to recommend that explains bugs and the route to take?

There were a few old videos about old route, and a few about the newest one, but overall non of them were finished ( i mean full playlist about those routes were not finished), so the best will be to just join our speedrunning discord and ask about route / skips etc. here, also i recommend to you to watch top 3 runs to see every new thing, cause they don't differ from each other, except better movement which can save you the most.