As you see from the date below the video, it was posted at the beginning of July, and I believe it was discussed around that particular time on this forum.
A number of my friends and family who are
not generally interested in the railways were quite fascinated, which may reflect the attitude of the general public, but they have been a bit put off by some of the inconvenient departure times, so they haven't joined me on any! I have covered a few, as have a couple of my enthusiast friends. Indeed, many of these workings will be known to carry enthusiasts on a regular basis. On-train staff are generally perfectly happy with this arrangement (perhaps because it can provide company and an amusing chat about obscure NR lines!).
Such trains are run either to keep a line open for route knowledge (e.g. to ensure an alternative route for engineering/emergency diversion purposes), or to prevent formal closure procedures, as you have doubtless gathered.
I use the excellent PSUL website to keep an eye on services over unusual lines and/or with unusual frequencies. You can find this here:
http://www.psul4all.free-online.co.uk/intro.htm