He wasn't bad but I felt kind of embarrassed for him because I sensed that the people filming it and the interviewer wanted to wrap it up and that it was taking all day. It seemed like he wanted to do take after take to get like a recorded track, when that doesn't seem like it's the point of these videos.
To me the point of the video is to just watch the person come up with something in a jam kind of thing, not go over it again and again to try peice together a track out of it. Like it seemed like Stamos was trying to hone it and make it good for a recording. Asking if certain parts were good or not. As though it was being produced like a song. As though he's a drummer trying to come up with a drum track for a record.
When his wife came in and basically said you've been drumming all day. Lol.