These "Hot Tricks" or Trick Shoot Outs are far, far from Tricks Party.
They were an "Open" event, no rules and generally judged by spectators with applause/cheers as the measure of success. Lots of fun, but not a real competition, like Tricks Party.
Because there were no formal judging rules for slack line tricks, and few of the sport kite comp judges could tell a backspin from a lazy susan, these events were the only way to include all the "other stuff" people do with sport kites besides what was being flown in most ballet and precision routines.
Around the time this video was made, some flyers were starting to include more sophisticated slack line tricks into traditional comp routines, and a few years later, with the example set by folks like Graziano, Debray, etc, really good slack line tricks were a must have in Ballet and Precision Freestyle. But by then, comps in the US were declining so fast it didn't really matter any more...