Just browsing around YT and found these vids. If you watch, it is over the same sections of trails, but of course, I'm sure the cable takes time to set up and tear down so I don't blame them. They milked the footage from those sections all they could and I think they came out great. So cool looking. Psycho dog too. Mount Prevost I believe is on Vancouver Island.
The first cable cam footage that I saw was from the Collective guys. It's a great perspective but really hard to do well.
Indeed, and I'd imagine, a tremendous amount of work. These guys did it pretty well, although I don't have much basis for comparison. In any case, it makes me want to get out and ride. That quality right there tells me it's a good video.