Typically, when someone does an ode to Final Fantasy, they'll do stuff like fan art or fan fiction. Mikeosong has a more novel idea: choreography to go along with some of his favourite Final Fantasy themes -- it's so good, you'd think it was something out of a boy band (my mind goes to K-Pop, but only because I've watched way too much of it).
Why choreography? His YouTube page says he's a dancer, so there you go. I'd watch other video game themed dances for sure, so hopefully he makes more.