Just an FYI, but not all states allow indiscriminate video taping. I recently had an issue with Johnny law and nearly got a $5,000 fine and time in the hoosegow because my video also had sound which is verboten in WA state.
http://www.infowars.com/15-years-in-prison-for-taping-the-cops/
http://www.cbsnews.com/videos/dash-cams-pros-cons-of-the-high-tech-devices/
http://www.expertlaw.com/forums/showthread.php?t=133857
Illegal also in Illinois, Oregon and NYC