Pulled over by the cops, no tickets given after they see they are being recorded on my DashCam

One of the first times I recorded an incident where I got pulled over by cops. After being stopped so many times and usually always given the reason that it was a "random verification" or as you see in this video they watched me for a while then tailed me until stopping me and telling me I had gone through a yellow light and have other infractions.... I let the cops know they were being filmed and my so called infractions would also be on the video if I indeed was guilty of them.... Of course, they let me go, knowing they could not harass me like that and get away with giving me bogus tickets just to give me a hard time.