This chorus was quite easy to animate as well. I used a lot of stills and short bits of animation, which were quite easy to draw.
In the section where Uko death-glares Klause, I decided it would be more impactful if I did not animate the movement between him looking away and looking back, and so I instead drew two stills and then used Premiere Pro later to crossfade to white (more info in my editing subpage). This not only took less time but also looks much more dramatic.