Fraps is a good free 30 second video capture tool.
MS Moviemaker or MS Live Moviemaker is a good video editing tool.
(Free) Irfanview is a good image manipulation tool.
Static & Tracking cameras can be placed every so often, at specified meters apart from one another.
Selecting panning or rotating can give desire effects.
It appears that the film has various short segments of movie stitched together.
You can fly and take videos in Free Roam by using your mouse.
Possibly the camera was shot using an external cab view from another loco driving on temporary BNSF50 Invisatrack.
MonkeyWrenchModels has a signal camera and trackside signalman camera for low angle shots.
In your Trainzoptions file, add the line: -freeintcam