Points are scored in a few different ways:
Hitting targets, people, windows, or objects with videos.
Jumping on cars, benches, mailboxes to perform tricks.
You'll also earn a bonus of 1000 pts per successful video delivery if you make it to Jessica at the end of the road.
You should earn the first 20,000 pts towards the end of the run if you are spamming videos and jumping on some of the obstacles.