I've seen several 1-man a capella covers, and they are cool. but this one breaks it down at the end to show you each individual part. Whether for one person or a whole group, this is how a capella covers are written- by breaking a song into its elements. Rad.
And here's why you join choir: So that someday, when you're on TV, you're ready:
p.s. yep, that's how you look when you sing. Adorable, no? That's why I'm smiling at you while conducting.