It's a bit odd that dielectric grease is "wrong"...
Not when you consider who writes the marketing copy for those products; it's NOT the engineers who cooked up the grease. Thousands of products are marketed wrong in the US. For example: "convection" ovens are specifically built NOT to cook with natural convection; they cook with forced airflow. So "convection cooking" means "cooking without convection". Long-life engine coolant must be changed MORE-often than normal coolant. So "long-life" means "short-life". Vehicles marketed as "all-new" for this model year invariably reuse many of the same parts as the previous year model (tires, rims, lug nuts, engine, transmission, light bulbs, seats...). So "all-new" means "not-all-new".
...Ford is the only company that markets "electrical grease."
No, many companies do. Ford is just the only one that packages & labels it correctly, because it's not marketed to the masses; it's mainly for professionals, who are supposed to know better.
I've been an aircraft mechanic for over a decade...
Did you study chemistry or chemical engineering before you got that job?
...use dielectric grease on electrical sockets as required by the technical orders.
Again: who's writing the orders? People who know the difference? Probably not.
should I contact the tech reps and engineers that the specified product is wrong?
Do you like your job? Probably not a good idea to tell your bosses they're wrong. But if you own your own plane, you'd be better-off using the right stuff on it.
Fortunately, I don't have that limitation here - I don't rely on anyone here to pay my mortgage. So I have no reason to condescend. My interest is in keeping Broncos running well, because I like Broncos.
So I'm going to tell you the truth (as I understand it, based on a lot of experience & education) regardless of who likes to hear it. ;D
Did you bother to read the comments on that YouTube page? Most of the replies say the same thing I am.