Q1. Can video clips from driving recorders (of any driver involved in a case, or any third-party driver) be used as evidence in court?
Generally speaking, a video clip, as long as its content is relevant to the subject matter, is prima facie admissible in Court as evidence. Another issue is the authenticity of the video clip: it has to be shown that the clip has been, since the time it was recorded, continuously in the custody of the person who asserts that it was not tampered with.
If you believe that a video clip on your driving recorder may assist you in the defence of a charge, you should keep the memory card in your safe custody at all times and be ready to testify to the Court that you have not and no one will have tempered with the content of the memory card.