A bit overconfident?
I should have warned you about his presentation style. I found it a bit over the top too, but it doesn't alter the truth of what he says.
Just to correct him here when he says Jews didn't know their family trees - Luke says Joseph went to Bethlehem for the census because he was of the house and line of David. (Lk 2:4)
That's a circular argument. You are claiming Luke's genealogy of Joseph is correct because Luke says Joseph knew his genealogy.
Up thread I cited the census thing as an example of blindly accepting what Christians tell you and I have discovered that it is nonsense. I didn't say why it is nonsense because it wasn't relevant then. Since you've brought it up, let's think about it.
Firstly, there is no historical evidence that it ever happened outside of Luke. There never was a census of all the World.
Secondly, it's possible that Quirinius did hold a census when he took command of Syria and Judea. Unfortunately, at the time, Galilee was not part of his jurisdiction. Why would Joseph, living in Galilee, take part in a census for a province of which he was not part.
Thirdly, it's nonsense to suggest that the Romans would let people travel to the place of their ancestors to register for the census. They want to know where people are living now; where they are economically active.
Fourthly, why your ancestors from 1,000 years ago? Why not your ancestors from 500 years ago, or 2,000 years? Why didn't all the Jews travel to the birthplace of Abraham to register for the census?
Fifthly, there is no evidence that the average Jew living in Galilee knew his genealogy going back a thousand years. None whatsoever. It's a myth propagated by Christians to account for the fact that the census story is a fictional plot device to get Joseph and Mary from Nazareth to Bethlehem.