Quoted from BigT:
I really enjoy the popcorn thread!! Vid, before I smoke a brisket I trim the fat off and render it down. Is it suitable for popcorn?
I hope you are leaving a 1/4" thickness of fat on that brisket. That's what gives it moistness through the smoking process!
Then I take the burnt ends and the rest of the scraps and make BBQ Brisket Chili!