Wow, on the second video, one of my favorite tunes, 'Dear old Stockholm'.  I'm more familiar with the Stan Getz version and I play it as a straight-ahead 4/4 jazz tune.  I've thought about posting it many times but figured nobody was familiar with it.  I'm glad that's not the case, it's a very pretty tune.  BTW, an awesome sounding instrument.  The tones (voices) exude quality.
chas
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"Faith means not wanting to know what is true." [Nietzsche]