Good catch. I frequently see videos that include an error or two. Either factual, or errors of omission.
But this guy needs a Fact Checker.
1. The Duke was not an "overhead cam" engine.
2. Fiero GT? The only Fiero, other than the Formula, that did not come with a Duke.
3. An electrical short in the oil pan? What?!
There were probably others, that I missed.
As one of my former co-workers used to say, "There's no substitute for knowing what you're doing."