I Finally Realized Why I've Always Loved This

It's a beaten down guy in a suit. He cuts loose in a fantasy at an empty hotel (which is empty only in his mind).  He even briefly pauses in the middle of it to contemplate whether he should continue this dream. And at the end, he sits back down in a chair and realizes his life has not changed at all.

Talk about Walter Mitty! There's even some flying like in Birdman.

(I don't know who I was dating at the time I first saw this but I remember her telling me the video was "stupid".)