I watched it without sound so I can't comment on the music but...

The body language was a bit over the top and the air guitar has always been a bit strange.

The only air guitar performance I ever enjoyed was on a Killarney street corner after drinking guiness all night. Those guys were amazing. They all grabbed different instruments out of the air and played a tune they all knew making the various instrumental sounds. All coming in at the right moment and totally tight, musically.