Happy SWSAT. I have been visiting in Arizona. Here are some of my photos from a local railway museum. Also, an older video from my layout.
This is a switching engine that runs off of compressed air,1000 psi, that was used inside mine shafts.
Fendermain, I looked closely at your video, particularly your cork roadbed, extra wooden ties, tubular track and 022 switches.
I recently purchased cork roadbed, have very similar (maybe identical) extra wooden ties I got at a train show 10+ years ago, and have the same tubular track and 022 switches which are my favorite track and switches.
IMO, your roadbed, ties, track and switches are very attractive, and your trains run smoothly and evenly, and with an abundance of speed.
I've started installing the cork roadbed on 2 long sidings, and can see myself, over a long period of time, installing cork roadbed under most, maybe all, of the track on my layout. I can imagine my layout, down the road, looking a lot like yours.
If you ever want to run your trains prototypically slow and smooth, you might consider LC+ or LC+2.0 and/or DCS. For LC+ OR LC+2.0, you would not need to change a thing on your layout, and it is extremely user friendly and simple to operate. To run MTH PS2 and PS3 locomotives on DCS, you would need to install a TIU and to purchase Barry Broscowitz book about DCS. My recommendation is to first get an LC+ or LC+2.0 engine and see how you like it. Switching operations (using electrocouplers) is much better with LC+, LC+2.0, or DCS. Arnold