Any trombone players?
 

I don't think he's actually playing...

Why do you say that?

the timing of sound and his lips....

I was in the band for 10 years... played the sax.

That's probably just youtube sync issues. I get that a lot with youtube. He's using a looping recorder program on his laptop. Some sort of computer variation of what artists like K.T. Tunstall use to be the entire band.