You are not likely to find free videos because you are getting into commercial travel DVDs.

There are lots of train DVDs that show what you are wanting.

I have seen excellent bicycling DVDs that are made for stationary exercise bike riders.
Play the DVD while exercising and you feel like you are traveling through some beautiful country scenery. Some of these will run for an hour.

If you plan on using your video for non-commercial purposes, see what is available in the travel DVD area.

If you plan on making something for commercial purposes, you need original footage or a copyright release from the owner.