No, the step-by-step I gave you is actually a highly streamlined, weeknight-friendly adaptation of Brian's ultimate, scratch-made masterpiece from the video.
If you follow his video step-by-step, it is a multi-day culinary project designed to build maximum flavor. Here is what Brian does differently in the video to achieve what he calls the best chicken pot pie in history:
1The Crust:
Instead of store-bought puff pastry, he makes a rich, homemade pie dough in a food processor using flour, butter, sour cream, and an egg for a super flaky, golden, and highly malleable crust.
2The Chicken:
Instead of pre-cooked chicken, he dry-brines a whole bird for 12 to 24 hours in a custom spice blend and slow-roasts it for nearly 3 hours to keep it incredibly juicy.
3The Stock:
He makes a rich, gelatinous stock from scratch by roasting chicken feet and bones, then slow-cooking them overnight in an Instant Pot to give the gravy an insane amount of natural body.
4The Veggies:
Along with onions, celery, and carrots, he adds chopped leek and fresh fennel to bring a subtle, sweet, grassy depth. He also waits to add the potatoes until after sweating the other veggies to keep them from sticking to the pot.
5The Sauce:
He deglazes his roux with dry sherry wine for a nutty sweetness. Because his stock is so naturally thick and rich from the chicken feet, he completely skips the heavy cream.
If you want a truly spectacular, project-style weekend cook, I highly recommend watching his video and tackling those exact steps!