Yeah, we're having issues getting deleted videos replaced, as the "replace video" option on their pages just does nothing. We also need some help filling out gameplay stuff (like, what enemies are in what levels and what kind of tactics they use) but that doesn't require any particular expertise, just patience. I can link you to a Japanese wiki with the info if you'd like to help with it anyways, though you'll probably have trouble with the effects if you can't read Japanese.
Most of the maintenance discussion goes through the Discord actually, so you might want to check there. There's been lots of talk of tables breaking and pages not calling the right names for items now that we have two names for each, but since I don't know much about programming you should probably ask the people there for details.
Aruo, it would be better to delete the video and re-upload it. I will report this issue to Fandom. And yeah, I would have some trouble editing the Japanese wiki. And yes, I will look at the Discord more often!