Video is definitely speed up Jay, there's no way the train is travelling at that speed as they would instantly derail.
Track like that is not uncommon. Some of our yards have "FRA Exempted" Track with a maximum speed of 5mph.
It's pretty insane, one end of the rail will pop up like a see saw when we hit the opposite end then slam back down as we transfer our weight to the other end.
That's what I expect is in the video. The person who filmed it probably compressed the video into a short clip simce that train was probably crawling.