I havent read all the replies so i may be talking old stuff now but ive had a camera on the bike for the last 3 years and have enjoyed it much to the annoyance of my friends. However you need to accept the limitations. I went at the time for the 4KAM bullet cameras which as a kit was about £300. Whilst its fun, that is all it is. If I was involved in a fail to stop accident it would only indicate what happenned. it is poor for number plates and identifications unless really close up. If all parties are present then great this would supplement any other evidence.
for my car ive recently bought a blackvue 400 v2 HD. This is a fantastic improvement and provides gps map overlay and speed. In summary go for HD as a minimum. This applies for home cctv aswell. For work my role includes investigating RTC and other crimes and the phrase "evidential value" always comes into play. if your a victim we need evidence or reasonable lines of enquiry to pursue not just a ghostly apparition damaging your car on your drive or a VRM for the idiot who just knocked you off your bike.
for my car ive recently bought a blackvue 400 v2 HD. This is a fantastic improvement and provides gps map overlay and speed. In summary go for HD as a minimum. This applies for home cctv aswell. For work my role includes investigating RTC and other crimes and the phrase "evidential value" always comes into play. if your a victim we need evidence or reasonable lines of enquiry to pursue not just a ghostly apparition damaging your car on your drive or a VRM for the idiot who just knocked you off your bike.