Now I see...
Sam learned this on the ukelele for Maddy because it's one of her favorites.
I made him re-enact singing it for her for the first time because my camera didn't catch the audio the first time.
Hence, the hint of reluctance on his part.
I adore it.
(Via the awesome 8mm app & my iphone camera.)
p.s. Sorry about the finger sneaking in there. Also, church is already canceled tomorrow, thanks to Irene. Everyone stay safe out there!