Can dashcam evidence be used in court?
Yes it can, at least in the UK. The person who was in charge of the camera will have to swear that the images have not been tampered with, but the evidence is admissable and might well be helpful, particularly when it is a case of one person's word against another's. It should be remembered though that the footage could conceivably be used via sub poena by the other side so best make sure that you really ARE NOT at fault before mentioning it's existence!