Your MacBook Pro specs are fine. Is this happening at home, or in the club? Can you install SMCFanControl to monitor the temperature of your computer? (just to check that it's not overheating) Are you also getting audio drop-outs? Are you playing your videos from your internal hard-drive, or from an external drive? (and if it's external, then what connection - e.g. USB, Firewire, etc)