Showed video to guys at local race shop. They said the same thing. Porosity of the cast crank. They said the if the owner doesn't want to spend the extra money to replace it with a better steel crank? Put a freeze plug in to stop the leak and let it go. They showed me several cranks that was drilled to remove weight with freeze plugs put in the back. If anyone ever runs into crap like this? Only a Dorman 555-117 28mm freeze plug will fit.
And it's also Made in China