it also
sort of looks like the woman
leans a bit over, to further help signal the brown dog that it's his turn, but, i could be wrong.(?) Maybe the dogs listen for
just the right note from her, to hit "their" spot on the keyboard.
my dog is trained to bark if i lift my eyebrows during a card trick, so maybe there could be more than just than the notes being played, being used by the dogs as cues?? it's hard to know for sure.
also adorable, is, at one point, the brown dog is getting to play HIS note a few times in a row, and then, the golden dog briefly scootches down to the low notes, as if to get on on that low-note action, too!!??
i can't stop watching it now...

i do have a keyboard.........