The video quality was so bad I wasn't sure what was going on. Cops need to get upgrades on chase cams.
Maybe the YouTube comments of the driver having the fence pre-rigged for this have some merit.
On the fence shaking, the commentators seem to say it is, to corroborate the "through-the-fence" theories, but I didn't see the "Patently obvious shaking" beyond a doubt in the beam of the fuzz' headlights.