The person that posted the video merely states: What is it? - A UFO?!
Look closely at these glowing entities as they pursue and observe the train.
There are three recorded instances that were posted on a Russian site and all of them have been placed into this single video. Such glowing entities have been seen following aircraft, over military bases and nuclear plants. This is what WWII pilots call foo fightersfoo fighters. They recording data for research purposes.
The July 26, 2014 in the railway Novgorod, Russia the presence of a possible entity or being pursued by the light rail at high speed and does it right in the middle of the tracks.