LOL Mine did the yawns too when I put him in his new home a few min ago!!! Take a look at his pic! I just posted it under "My princess turned out to be a prince!" The first one is dark but then I got a better lit one!
Hahah! I just watched your youtube video! What a character he is! He's very pretty, too! Oh, and I love your tank, too.
I used to think something was wrong with my betta because he'd dart around really fast and neurotic like. So it's nice to know that it's natural. I suppose since I usually see betta's in those tiny little cups and not moving I just thought they didn't swim around much.