TL;DR
The video "PCB Copper Pours 101" by Phil's Lab dives into the fundamentals of copper pours, also known as polygon fills, in printed circuit board (PCB) design. It covers essential design rules, the importance of thermal relief to manage heat dissipation, and how to maintain copper balance across different layers of a PCB. Phil breaks down the pour order, explaining how to prioritize fills to avoid potential design issues.