First off, it had a good beat and I could dance to it. I'd give it a 98!
Secondly, and on a more serious note...
I would not recommend doing that in the post 9/11 world. At worst, as noted by most of the replies on here, you end up seriously hurt...or dead. The least thing that may happen to you is when the aircraft is diverted and it lands, you are escorted off the aircraft by Federal Marshalls. Somebody pulls this trick on my flight and I'm diverting to the nearest suitable runway and landing and letting the Feds deal with you.
Unfortunately, under the current Administration, they will probably just read you your rights, talk to you a few minutes, send you on your way, credit your account double frequent flyer miles, give you a free home, free vacation and a job in the Department of Homeland Security.
Although most of us would go TERMINATOR or DIRTY HARRY on the passenger that played the video, it is one way to make the mother-in-law stop talking for a at least a minute. Hey, send it e-mail to the in-law just before you have to turn off the electronics.....one way to say hello that leaves a lasting impression on the M-I-L.
I kept waiting for the dancing middle eastern girls to show up. Those girls can really dance. I wonder what it would look like if we mixed middle Eastern dance with Hawaiian Hula?