Oh I didn't know the rap wasn't in the game! That's why I didn't watch the YouTube video because I wanted to wait until I play my Switch version and see the rap in the game. I thought they'd have it play at the start like in DK64.
I asked this in the thread about the updates being 6 times the size of the game, but that thread seems to have died; does anyone think that all this missing stuff - the rap, the N64 shader mode, the orchestral music, etc - will be built into the Switch version of the game (rather than coming later as updates for PS4/Xbox One/computer), seeing as though the Switch version is still being developed?