Here is a link to a 2022 TV Ontario documentary on this unique train (mostly just 2 Budd RDC's) that travels Ontario's near-north from Sudbury to White River. It shows impressive scenery and stunning panoramas of this part of the Canadian shield and boreal forest, popular among canoe trippers, campers and fishers. Frequently, the doc provides key historical notes and railroad operating rules. The helicopter camera and the camera mounted on the outside of the front of the cab provide unparalleled views of the train, track and terrain.
Warning: it is nearly 3 hours long, so not a quick study.
Bob