Most videos are best kept short to 3 - 5 seconds (any longer and the viewer gets bored).
Splice hundreds of 5 second shorts, together, using Windows Movie Maker.
Use a Trainz rotating trackside camera, and position it down low, at a pedestrians height, or no higher than a 30' bridge (very rarely does one view trains from a 30 story building).
Most people make the big mistake of using the ride along tracking view camera, which is highly unprototypical, as unless you win the Lottery, you wouldn't be filming Trainz with a follow along whirlybird chopper.
Place a trackside camera several hundred feet past a grade crossing, as the worst sound effects are a rudely loud blaring horn, and annoying clanging bell, drowning out your train soundtrack, and blowing out your sound system.
As in railfanning ... A video 50' - 200' distant the tracks, gives the best view.