This is pretty well up there with "you know they're just men with voice changers" in terms of how often I see it tossed around when pretty simple observation tells otherwise.
Sorry mate, you seem to have fallen in love with a cartoon character. The video you posted a link to, is also very clearly just hired dancers. There is never a point where all those VA's were in the same place (presumably japan) to make that video. Dancers need to spend a full time job to practice their coordination. Hololive use the line "going to dance practice" as a euphemism for going to the gym.
For example take the Hololive Promise 3D collab
There are several points where they do coordinated dance sections, where it’s clearly just hired dancers. Like are we to believe that Iris and Bae suddenly learned to Samba? Or Kronii who always said she hates dancing, and is bad at it, suddenly was able to coordinate perfectly? Use some brain power.
We also get an encore at the end, which DOES seem to be danced by the VAs. This is what a VA dance section actually looks like. Fun, but uncoordinated with only basic choreo.
There are too many examples to mention but think about when Leslie’s father commented (negatively) on that dance with Gura she did as Bae a while back. The obvious thing to comment on was the slutty dancing while looking like a child. But no, he commented on the falsetto singing, saying anyone can do that. Obviously that wasn’t Leslie dancing, just singing.
Check out the Holotori Dance 3D video too
https://www.youtube.com/watch?v=bzbB-rLw4SQ
Those VAs weren't together when Mumei has been chronically ill. They didn't even get the VAs to sing a new version of the song. Its just the official recording, with a few effects added. Even the dancers they hired look bored and sick of that dance while they perform it.
You also seem to have blocked me for telling the truth? So I can't Quote you directly? It was
Burnt Fish BTW.