i am either too old (or too young)....but i thought burnt ends just happened when you cook a brisket. i dont recall ever hearing any old timer say "hey...lets make some burnt ends!"
as long as i can remember burnt ends was doing something with the brisket that wasnt served sliced (the best part). the ends were chunked and served as burnt ends or chopped along with the rest of the brisket that wasnt good enough to slice and used for sandwiches.
just my $0.02....but talking about "making" burnt ends and then raving about the taste (vs raving about the sliced brisket) is funny. the part about someone "inventing" burnt ends is funny too.