The video method was an excellent means of getting the problem displayed. Maybe get an assistant and record how the car ***** and where the clutch pedal position is when it "bites", and especially show how it behaves when you put it in reverse and move.
There seems to be quite a bit wrong with your shifter system, (the u-joint and the handle system that is bolted to the car body) and sometimes it is just better to start with another complete system.
On this forum you can post a "wanted to buy" request, or check the existing "SHO Parts Classified" or "SHO Parts Cars" for "Rod Shifter" complete systems.
The "Wanted to Buy" section attracts the attention of long time suppliers like Rubydist and SV&HOdan and many others who have a lifetime of experience on these matters for both pricing and advice. The same rod shifter is used from late 91 through to 95, so they are out there.
All 3 of my manual transmission cars have needed a new clutch soon after I purchased them, so you may be in the same boat. It seems to be almost an unwritten condition of sale. But like I said, you can nurse them along for awhile if necessary to wait for a good deal. And I have never had to replace one since, so once they are done, they are good for as long as you own the car.
I would work on that shifter issue first, as there is enough wrong there to give you all kinds of false readings and problems. Getting the parts from SHOSource is not a bad idea, but it doesn't solve the rotating handle issue and whatever else is wrong with that shifter stalk. I would get another shifter system that does everything properly, and if you need improvements for lightning quick shifts, then you can get the new parts. (That is just me).
The clutch issue usually show up by chattering when you put it in reverse and move the first few feet, especially going up a small hill.
Do the video, show your foot location at the bite point, and more knowledgeable people than me will comment.