I don't see much in these videos (I only watched to #5). Still pictures of a pretty engine, lots of Superlatives etc.
Sure he is using quality parts, and presumably on a daily basis 'Doing it right' But this is only what I would do if I was building an engine in my basement. Taking my time, using Lube and Loctite where applicable, Not forcing anything, working in a clean environment etc.
I have also been to exhibitions where companies show Jewel like engines to ADVERTSE there work, but I bet 9 times out of 10 what they sell is not up to their exhibition standards.
If you do the job yourself, YOU can be the judge if and How you cut corners, anywhere else, you are at the mercy of the engine builder. Lets face it, we all have good and bad days, I will not build an engine for MY car on a bad day!