I think the only time I ever used sign language was to sign "Climb Every Mountain" on Parent Night in fifth-grade. So I have no idea what this guy is saying.
But even when there's no hope of communicative cohesion, you still find yourself leaning in, trying to isolate the data being conveyed, with your eyes -- and, to some extent, your ears.
When the video ended I was left teetering over the brink of understanding, stretched so far outside myself that it took a few minutes of quiet to reel me back into the present. Kind of amazing where we can go, without going much of anywhere.