These are all jokes!! Even I, myself have done those things (except the ifuudoudou part, it's not like a slider note is going to make the game explode or something bro)
For the ifuudoudou, please do not look up the english lyrics.
please
I made myself rage at the last part
Part two is now out: https://www.youtube.com/watch?v=16FfXig_MrI