I could listen to this all day.
The man in the video is Douglas Shaw aka Sleepy Doug Shaw aka Highlife. His music career seems a bit sparse from the research I’ve done; recording things here and there and performing with groups such as “Gang Gang Dance” (website) and “White Magic” (listen here). He released an EP as Highlife called “Best Blest” (read about it here).
The instrument he is using is called a shruti box.