Cool video, but illegal? Really? It isn't like the drone was going to do any more damage to the train than a mosquito would do to your windshield. It's not what you would call a populated area. What is that washed out track in the foreground at 0.22?
Trespassing? Can I be guilty of trespassing if I don't set foot on your property? If my dog runs onto your lawn while I'm playing fetch with him, am I trespassing? I don't know, I'm asking.
As far as going too far, the whole video is shot around that one bridge across the creek from where he was standing. I doubt the drone ever traveled more than a half mile from where he was.
As far as needing a spotter when wearing goggles, his spotter is standing right next to him when the drone lands.
As far as the drone pacing the open cab window, that happens to us all the time. Hell, about ten or so years ago, some guy in a freaking biplane used to pace us like that on a regular basis, I could have hit him with a lump of coal more than once. For that matter, I believe that it is against RR rules at least to haul a box car with the door open.
I will forward this video to my friends for their entertainment. In my opinion, a lot of posters here need to take a chill pill.