I can't figure what particular poor quality clear coat he was using. The clear coat I use is nothing special. I have never had any of the peeling or chipping problems mentioned in the video.
I clean the anodised trim normally, using a sponge when washing my car.
I then apply clear coat from a spray can directly onto a clean rag and CAREFULLY wipe that over the trim, and avoiding the paint, for obvious reasons.
I repeat the process every 18 months or so, to maintain the new sheen appearance.
For concours presentation, it would be best to remove the anodised trim, clean it and spray clear coat directly onto the trim, rather than applying clear coat indirectly in situ, using a clean rag.
Originally, the anodised trim on my car was VERY blochy and milky, equal to the worst I have ever seen, but the anodised trim on my car now has near new, perfectly acceptable sheen to it.
I think that Mercedes-Benz will actually sell you a clear coat type of product, so that you can maintain the anodised trim yourself.