Highly recommend this song. Very simple melody and interesting chords.
If I heard correctly Joao slightly anticipates the downbeat all the time, not even a full 16th note, but just enough to make it bounce. I believe he plays in B minor. There are other examples on YouTube in C minor and D minor. Link to Joao playing is next.
Composer of the music Carlos Coqueijo. This fine man has one of the most admirable resumes that I have ever seen! A true Renaissance man.
Here is an article about his life. It can be copied and pasted into Google translate. https://pt.wikipedia.org/wiki/Carlos_Coqueijo