During the video it says "train sound, very faint".

I used to live about 3-4 miles from a track that carried a cargo train every week or so. The area was foothills and the tracks followed a course that took it on level ground, through the foothills.

The sound of the locomotives at a distance was VERY VERY much like this and the oscillations of the engines was enhanced by the baffling of the noises through the hills.

If you can detect other sounds that identify a train in the distance, I would be almost sure that your sound is that train.

Hi, the "train noise" is what has been heard on other videos. I call it a train noise because it sounds like it.
It can't be a train. There is no traintrack anywhere near, the sound is much to loud to be a train and it comes from all directions at once. Alos, since i have lived here for five years I would have heard it before.