Jesus wept you people, it says [CGI] in the title FFS...
https://www.youtube.com/watch?v=IwR14D3NA8c
it's OK as a fake though, until you notice that as it goes over the tracks the ball is also illuminating the side of the track rail opposite the ball, so it's clear that the glow is just an overlay rather than a point of light
Thanks for that link, but in all fairness, that isn't the original video I viewed and posted, which didn't indicate CGI, so you can stuff your "Jesus wept" comment.
OK, fair enough, but it was in the description
"Original video by Andrei Trukhonovets: https://youtu.be/IwR14D3NA8c"
(post is archived)