JUST IN GENERAL... so don't get upset.
But if a track is single line that should be telling you something. That is the fast line or easiest way around. If you want to promote multiple lines then the track has to be constructed with that in mind. A single corner may be 100 feet wide but if the inside is the fastest way around, then no one will use the outer 99 feet UNLESS there is something out there, like a berm. Inside half jumps or whatever you want to call them, are a great way to "suggest" a different line. Walk the track after an event (practice or race). if a corner has one line, then think about what is before it and after it. Fast straight into a 180 and its only one line? then built a hump on the inside and/or a berm on the outside and see if the line changes the next event.
Yes, most guys play follow the leader. Even if its not the best line. But as Georgie said. this is not the way A or pro's ride. They are not afraid to cut new lines. (That's why they are fast).
A trick from back in the day was to put out hay bales in what you know will the "one line" for the first practice. Once that session is over, remove the bales and the riders will develop a new line there. BOOM, you now have two lines. When a rider comes up to complain that he cant pass on this cow path. Suggest he remove the blinders and try that pretty rut 3 feet away from where he goes every lap.
I thought the track looked pretty nice in the video. May need to make the trip up.