Very good video, but I do have some concern where at 10:30 in the video you grease the spring plate rubber bushings before final assembly. I would not recommend using anything like the plastilube from my research.
I have installed mine according to the Elephant Racing and URO rubber bushing installation directions. The bushings are glued when installed on the spring plates. When assembly is installed into torsion bar tube, they recommend only using soapy water after cleaning off all dirt and grease.
From Elephant Racing:
Rubber Bushings – How They Work
For all their faults, rubber bushings allow suspension movement with very little friction. Rubber bushings do not slide in their mounts, they accommodate movement by deforming in a twisting motion. There is no friction surface hence the friction is very, very low. Rubber bushings resist movement due to the spring rate of the rubber, not friction. Their behavior is similar to a torsion spring though the spring rate is small.
https://www.elephantracing.com/suspension/instructions/2290003_Spring-Plate-Rubber-Bushing-Instructions.pdf?iframe=true&width=80%&height=95%