Any theories on strange UFO vid?

Sorry I don't have much to contribute on the subject but there have been a lot of similar videos to this one lately and I'm curious as to whether or not there are any reasonable theories about what these UFOs could be.

https://www.dailystar.co.uk/news/wei...ornia-20097741

via International Skeptics Forum https://ift.tt/2lYwWOy