Here's my thoughts.....
1. Ya see that car is about to turn, as the fence approaches therefore police car is about to turn to chase in car's way, that car could have moved around the fence, as it could have been a 'last fence' and then police bumped into a fence.....another fence or fake fence...
2. Another theory - you see that car is fading in front of fence view at the end, it could have been real, and if there are all fences standing horizontally, why was the fence not shown? Here's the picture...
The car's rear red lights should have lightened the fences...
EDIT:
Hmmm, I just found and checked CourtTV message board and I don't see a single person or people on that board talking about that kind of video, most likely fake