An entertaining video, and well-made. There were 8 trestles over Todd Fork on the Zaneville line, and one trestle over the East Fork of Todd Fork. There are 6 remaining that show up on Google Earth, so maybe that's why she says there are six. The three that were near towns--Morrow and Clarksville--were taken out, probably so that liability issues were reduced. But you can still see the ones that are inaccessible, if you follow the line out of town. The bridge the video shows is the only one near an existing road.
Trains ran on the railroad until 1974 when Penn Central went bankrupt. I grew up in this area and can remember trains in Morrow when I was going to Little Miami High in the 70`s. The sign is wrong