Hi, I was never really into Thouhou, but Bad Apple and others were so much bangers and i’ve listened to them for year.
I remembered the OG Bad Apple video on Youtube so many years ago to be something like 3 and a half minutes, maybe 3:45 or something. But after I went back to listening a couple of years ago, the song is longer than 4 minutes, and so is the animated video, with a longer instrumental, a longer bridge, and a repeated verse.
The video I watched was the same, uploaded previous to 2010.
This is some form of Mandela Effect that I experienced and I wondered if someone got the same with this same song.
Bad Apple is supposed to be ~5:24 for the full version. It got famous for its PV (promotional video) which is only 3:49. This is the version which made it popular, and likely what you watched.
Subsequent fans have edited the PV by slowing it down in certain sections so to set it to the full version of the song.
PV version: https://www.youtube.com/watch?v=UkgK8eUdpAo
Edited full version (read description): https://www.youtube.com/watch?v=9lNZ_Rnr7Jc