Rider didn't put the gascap on because he wasn't interested in sticking around to talk to the guy that jumped out of the SUV. Based on the motion of the camera, it is a camera on a stick off the back of the bike. Gyroscope stabilized so it stayed upright as bike tipped. Software hides the stick. Camera records a sphere and you can select what appears in the finished video in software.
Conceptually this:
EDIT:
Interesting string of events. This could go either way for the cops. Tackled because they thought it was stolen (it wasn't), stunt driving and flight from police. All of those disappeared and he got license tickets. Probably a case of cops or ALPR screwing up and they got lucky that rider had issues. Now, if rider was innocent, they could easily post the previous ten minutes of video. I suspect that video won't help the riders case. Given the arrest, I assume the cops have a copy of the whole video?
Are any cameras recording encrypted video yet? Make the card useless without the password. Once you have processed on a computer (using the password to decrypt), exported video would be normal. Solves the issue of self-incrimination.