Don,
The first video was an ad screen/photo and words.
The second video was talk but no example - just a photo of a partially used tube.
The third video was "The Right Stuff Failure".
I stopped looking at videos, after that one.
Maybe no one made a single post for a reason?
I have never had a leak problem on a 2-bolt or 4-bolt valve cover or a side cover, with flat/clean metal surfaces and good gaskets. I use sealant on one side of the gasket - so I can reseal. Just be careful not to over tighten.
