As a sometime squeezebox man (piano accordion and melodeon) - I have been on the lookout for good players over a span of several decades.
I've seem plenty of remarkable playing, but nothing as remarkable as these two pieces performed by a young Irish folk musician called Cillian King.
The thing is; his instrument is an Anglo-Concertina, which gives a different note on the push and the pull. This makes it great for some kinds of folk music (since it has a built-in bounce, due to the need to change direction of the bellows so often) - but not for for classical music.
Furthermore, it is essentially a diatonic instrument designed to play in two major keys (a fifth apart) on two rows of buttons; and various missing 'accidental' notes (needed to play chromatically and in other keys) are distributed in a third row.
All of which would, I would have thought, made it impossible to pay what this young chap plays below. The fact that he does so with great verve and musical phrasing is a terrific bonus. He actually gets better the long the pieces go on!