That's quite a nice clip Jim, reminds me of past days when two players just played together simply for fun and to make music..
Back then in our day, it would have been a couple of cheapo guitars, possibly not even electric, or with cheap screw-on pickups and sharing one crappy little amp or something..
I saw two young chaps play like that a jazz festival side event some years ago- two scruffy teenage lads, two cheap acoustic/electric guitars, sharing one cheap amp....sat on a town hall stage , very nervous...THEN they both started blazing away with incredible technique and timing etc, playing a duet on a John McLaughlin jazz number...AAARRRGGHH! Future virtuoso players, wonder what became of them?