The railroad video market, like the all color book market, is pretty well flooded at this time. Having said that, on older topics that were originally photographed on film rather than videotape I prefer material that was done by the relatively few photographers who used 16mm cameras rather than 8mm or Super8. In addition to the individual frames having nearly four times the image area which greatly reduces the grain distortion, most of the 16mm cameras had better optics, and because of the higher cost of the film the photographers generally were a lot more selective about what they shot and how they shot it. Unfortunately, use of 16mm was rare to begin with, particularly when shot at sound speed, and most of the usable 16mm originals have probably found their way to video producers by now so there is unlikely to be a lot more material showing up in the future.
The cheapness and availability of Super8 in the 1960s to 1980s, and the videotape formats that have taken over the market in recent years, have resulted in a great deal of sloppy photography and redundant footage in productions on modern topics.
"We Repair No Locomotive Before Its Time"