From the description of the video itself:
Since circa 1964 (after the Wabash/N&W merger), the line hasn't received any major repair work, and also runs through Ohio's Great Black Swamp for the majority of it's length. Combined with those two problematic factors, the MAW was bound to creepily slow speeds. In this video, ex-Illinois Central GP10 #16 (in a special Operation Lifesaver paint scheme) struggles to pull empty box cars through the small community of Jewel, on a portion of track that resembles the entire railroad. This line, as you can see, was and still is in dire need for repair. However, at the time, the costs were estimated in the millions, and way too costly for the MAW to maintain. As one can see, it's very hard to imagine that this line was once a mainline on the Wabash Railroad. Despite the poor conditions, the MAW had made some minor improvements with ballast, but as mentioned before, without the sufficient funds, the line still deteriorated. But, in late 2012, hope was yet again revived for this line.