Well, how about that! Congratulations!
That brought a big smile to my face. I think you have a fantastic scanning disk there, and it's great to see such a sharp image first-up. What I also notice is the beautiful steady frame - although the PID may need to be adjusted on the initial synch, it appears to be doing an awesome job when locked. I see it has "frame locked" to the correct scanline, too - that is something I'm quite proud of and when you see how simple it is in the code... kind of cool.
As to the PID overshooting, it's actually just a single value to change in the source code. The spin-up has a couple of stages, and it's the switch-over that is custom-set for each particular televisor. That switch-over takes account of the inertia and friction of the disk and clearly (expectedly) our disks are different. But, fingers crossed, easy peasy fix
I also note with interest the modifications you have made to the power 12V and 7V feeds, and the infra-red connections.
If you're like me you've probably already spent quite some time just watching the thing, mesmerised.
One thing that's not immediately obvious with the LCD UI - the track position shown on the bar on the bottom is actually interactive - it's a "seek" bar as well, so you can slide back and forth to get to different parts of the video. Of course when that happens, the disk will need to re-synch and that may be a pain until you/we get that PID changeover correct. I'm really stoked, though, that the frame is extremely stable in the video you posted.
As to that, I did some small edits on your post to fix up the embedded image links. I also converted the video from MOV to MP4 (with "web optimised") which allows it to be embedded in the post inside "video" tags for auto-play. I checked the web host support site - they do not list any issues with speed, so I don't know what's going on there.
Anyway, well done. Let me know when you get sick of your one and only NBTV8 video and want some more stuff to watch