It was hard to tell because the video was so small but it did look like he tapped - I thought I could see his hand swinging and the way the ref stepped in it looked like it could have been over.
But yeah next time hold on until he is unconcious or the ref pulls you apart.
You will win next time!
If it makes you feel better I did pretty sh!tty at my bjj comp on saturday. I dunno what happened.. just a bad weekend for both of us.