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Yeah I didn't see any lifter damage or anything wrong with the anti-rotation device as pictured.
The lifters are the same as the twin cam anyway, so we've always known they were not great and way better offerings are out there.
The carbon on the pistons is typical as well.
What did catch my eye was the piston skirt.
Worn pretty well for that low mileage but I'm not certain if that's normal yet with the M8.
Overall, I didn't see a smoking gun. Just a guy sharing his opinion.
"Plastic" lifter anti-rotation collars are common place inside mass produced car and truck engines. Plastic timing chain hydraulic tensioners are used on pretty much every engine Ford produces going back at least 15 years now and they dont break or fall apart. Plastic intake manifolds, valve covers and oil pans too.
I know plastics or polymer these days are incredibly robust. Putting the opinion of the mechanic on the video aside, would fitting metal anti-rotation collars make more engine noise.
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