Mighteyes | The Michael Rosen Jazz Band @Mighteyes | Uploaded February 2016 | Updated October 2024, 5 days ago.
This idea came to me when I was looking at Michael doing the inhaling face. I thought: "What if he was blowing into a trumpet?" And there you have it.

The song is "Blowin' The Blues Away" by Horace Silver. Although this version is taken out of the anime Sakamichi no Apollon. (Kids on the Slope in English.)