Nothing interesting happens in the video after the first 15 seconds or so, I just find it a remarkably good idea to put into practice to get your camera filming the cop in case he screws up and you can use the video to toss out any tickets he gives you, or against him if the cop is unprofessional.. .. your word against the cops word never will win for you.
Alex comments that corrupt Russian police are often trying to decieve and take advantage of people and for a driver to record every thing the cops do is self protection. I agree