How does it work?

Its really quite simple. Once the League starts at the given date, all of the people signed up will be put into regions, they will be placed directly against 1 other person and will be given a specific challenge to record and upload to a video streaming website (For example: YouTube). They will then post the link to that video in their challenge topic, and at the end of the deadline, the judges will judge all entrys based on how well they fit the challenge and decide together on a winner.

Example:
Lets pretend this is a topic in Region 1 with the title "Nka19 versus Stumpy", it contains this text:

Round 1
Challenge: Do a grind in a faggio
Deadline: 30th May 2010

So that would be a typical topic, so all you do is, go do the stunt based on the challenge, record it, upload it and post it in the topic by the 30th of May 2010. Its quite simple.

Stunts can be done on GTA SA Single Player(recommended), or SA-MP.

Here is an example of how an entry looks like:
World Of Stunting League 6: Round 2 - Nka19 VS Stumpy

Also note that you do not need to spend any extra time with editing of the video at all as judging is on the stunt not the editing.