I am trying to figure out what this is. One of the comments I saw stated it was a concertina. I still can’t find a good explanation of the difference, except that Accordions take longer to burn...:)
Actually, they said the buttons on a concertina can’t be used in chords like the keys on an accordion. But they also said that some accordions have the little buttons like this one the guy was playing, and not keys as we usually expect.
This is all new to me, I never paid much attention to accordions before. We had a beautiful one in my parents attic, a very, very expensive one, and it disappeared. I always wondered what happened to it.