That video seems to be about issues where the head is struggling to seek. Its perhaps good to put a little oil on the stepper bearings, but if your main spindle isn't spinning at all - i.e. the disk doesn't spin up (and trust me, you know about it if it does) then you have a separate issue.
I've had three MiniScribes in the recent past one was fine, one struggles to spin up and the third has some more... unknown issue. First things first, these are horrifically unreliable drives. They're famous for it. A working MiniScribe is the exception, not a broken one.
But this said... There is a slight chance you might get the drive working again if you carefully unplug the connectors on the controller board (photograph it first so you know how to put them back) then unscrew and remove the controller board on the bottom. This reveals a large flywheel that is actually on the same spindle as the platters. Very gently try to rotate it with your finger. Does it rotate freely? Or is it stick solid?
If it is stuck solid, put the drive in the freezer for an hour, take it out, and try to rotate the flywheel again, this time I'd say try with a bit more force. If the head is welded to the disk surface, this might break the head, but... lets be honest, if the head is welded to the disk, its probably done for anyway.
If either before or after freezing, the flywheel does move, but is a bit stiff, sit there and rotate it by hand for a few minutes. See if you can free it up some.
All the while, as mentioned, DO NOT move the stepper motor arm (the thing you see moving in the second video following), or you'll have to spend ages manually repositioning it.
Here is a video of one of my MiniScribes for reference, so you know what one spinning up and seeking sounds like, so you know when things are going better.