Bfagan, I really liked the video and it's clarity! I would like to mention a few things that in no way are meant to disrespect you, your layout or video in any way.
1. I think it's amazing how the LH to RH rail head height affects the locomotive's shimmy as viewed from the camera. I think Unitrack is about a level of a product one can get (if laid on a level surface to begin with) and unless the loco is stabilized, I can't see a way to correct it from a video perspective. This also convinces me that the double stick tape method used by David K. Smith is best for that aspect when laying flex track rather than variations in glue thickenss affecting rail head height.
2. I would love to see comments added to the video in YT as to the loco's location, i.e. "Entering helix tunnel to lower level", etc. that always interests me in terms of time and place and editing.
Thanks alot for sharing! i will definitely want to buy one of these recorders in the future.