The 1982 D has to be a Small Date. Do you know the difference between the Small and Large Date? Please post a picture of your Cent because I highly doubt you have a Small Date. Your 1983 is normal. Copper Plated Zinc Planchet Cents should weigh 2.5 Grams.
So the article says he's looking for a super rare coin and then talks about how you can tell by dropping the coin on something hard. SMH, oh hey you might have this rare thing, try damaging it to check. LOL. Then I can't believe his phone number is publicly posted, thing must be ringing off the hook, everyone thinks they have the elusive white whale in their pocket.
It’s only worth face value. You want the small date copper to be worth the money snd only two have been found since these were minted.
There is much on YouTube that is interesting. And some on YouTube that is correct. Unfortunately ... What is interesting isn't correct. And what is correct isn't interesting.