One of the reasons I picked up guitar - other than to play music again in a way that doesn't bother the neighbors, only my family - was to play bossa nova. So I recently discover bootleg YouTube music videos. I figured I could use it to stare at the player's fingers and go from there, but the *&%$^!! cameraperson keeps cutting away at crucial moments. There are two chords in particular of which I've figured out the flavor (more or less) but not the inversion.
But by now I am really good at gently shaking my head and wrinkling my forehead in particularly expressive sections. Give it a listen. It's Joao Gilberto doing "Estate" - an Italian song from a movie I haven't seen.