This is a good one to examine because it covers a wide range of vocals.

A "soft" male vocal.

Then a "big, loud" male vocal.

A "soft" female vocal.

And a "big, loud" female vocal.

And the "whole bunch of voices" thing.

There is obviously a huge amount of reverb. And delay. I hear some chorusing effect. There is likely fairly heavy compression to get this vocal range even - that is, of course, a guess - riding faders could account for that, too...



Do this effectively, and you too could have a BILLION Youtube views...