Yes…exactly as Knick explained. That video has aged a bit. And nearly everyone sets the pierce clearance to 0.0. It is not needed.
There is multiple ways to get a lead-in and it seems there are all sorts of opinions and tried and true methods but let just look at the lead-in radius and lead-in distance of a 3/8" hole:
First is a 60 degree sweep angle with a lead-in radius of 0.08 with no lead in distance nor pierce clearance (no pierce clearance in any of these examples)
Now I add 0.1 lead-in distance, in addition to the 0.08 lead in radius with a 60 degree sweep angle
But if you just concentrate on one thing like the lead-in radius this is what a 160 degree sweep angle with a lead-in radius of 0.08 inches
This is a really good, concise summary for lead-ins from Tin. You will find that he does lots of testing before he actually shares his results so his advice is very good: