Basically, you play a stunt, save the replay, head over to Director mode and edits things like length, camera angels, add slo-mo, then export the stunt to your memory stick. Once it's exported, you can upload the stunt too and show off your mad skills.

Jackass doesn't work like that. The stunts in the show were just as good whether they accomplished what they set out to do or failed completely. That means that our goals in a stunt had to make sure that an entertaining failure worked just as well as a resounding success.

Via PSPFanboy