UFO Chases Airplanes in Aylesbury, UK

Here’s a home video from Aylesbury, UK that shows airplanes being pursued and chased by unidentified flying objects. As you can see in this video, the planes are being tailed aggresively by the UFOs as they are literally right behind them. The planes appear to be just taking off as they still are quite low in the sky. I wonder why the UFOs would be so interested in these planes. Good footage here. Enjoy.