I actually have an idea for a movie based around video games. It follows the typical sports movie mold, the same one used in The Fast and the Furious, and 8 Mile.
The protaganists are a gaming clan, who play UT. The lead is the newest member and not sure of his abilites. Because of him, they lose a regional tourney.
Eventually, they get into the World Cyber Games. But look who they face in the first round: their local rival clan. They tie, and win the next two rounds, getting into the final.
At midnight, though, the rival clan sneaks in, and changes the configurations around. The mouse sensitivity is whacked and inverted, and they lose the first game of the finals.
It turns form bad to worse, but in the end they succed because of the actions of the main character.
Since this is a formulaic fill in the blanks kind of movie, that's all the plot you need, the rest is easy. Of course, licensced music is also important. The movie would have in the background loops from Kraftwerk, MC Hawking, MC Frontalot, and lots of OC Remixes. The climax would be done to "Quakemaster".
Hey, it could work!