I learned more about the state of the art in Isolation Products in 30 minutes than I have in the last...forever?
To his credit, the fellow in the video can speak without a lot of hemming and hawing.
But this presentation would be much better in written form with product pictures and diagrams. Even though he shows a few products in the video it is difficult to imagine what he's talking about from his quick verbal descriptions of product construction. Since he focuses primarily on constrained layer damping, showing a diagram of a product that identifies the layers and materials and the order of those would obviate the need for lengthy verbal descriptions of products that we cannot see as he describes them.
Product descriptions include a fair amount of "covered with rubber". Given the variation in materials used, "covered in rubber" homogenizes products rather than differentiating them. Much of the "rubber" is actually a viscoelastic; getting manufacturer information on what is used - even if identified as "in-house proprietary" - would further help in product differentiation. Sometimes he mentions as speculation that the rubber might be sorbathane. One thing you won't learn from listening to 'The Audiophile OCD' is that products using Sorbathane(tm) have a limited life span.
There are other classes of products he does not cover, so this is definitely not "all you need to know" as the video describes itself.
I"m sceptical of anyone who proclaims product X is the best in the world and product Y is the second best in the world.