Like Astro, I have some experience with radar systems, IRST systems, and HUD displays. For 30 years, I was an Air Force pilot, and flew the F-106, F-4, and the F-16. I agree with his statements. Take a look at the video where the "UFO" is crossing the nose of the fighter at a high rate of speed from the upper right to the lower left. That means that the target is crossing from right to left at very high speed as the range to target decreases. They finally get a radar lock on one of the UFOs. The fighter should have to make a VERY hard left turn to keep the target on the radar scope. It does not make any turn at all other than a very slight left bank. The range to the target stays constant at 4.2 miles. This is geometrically impossible. There are similar problems with the other videos.