thanks for the video, but he does not take the pill itself apart as it is done in this thread
https://www.candlepowerforums.com/vb/showthread.php?428495-Maglite-ML-25LT-3-Cell, the heat really moves away only via edges of the mcpcb, there is nothing on the bottom of it to move heat away, looks like black plastic with a contact spring, that is why it has to drop down after 10 or so min. no matter how good you press fit the pill into the body (which is steel, a poor heat conductor) when the heatpath from the mcpcb are only it's edges, it is very inferior design compared to most modern lights where the star sits firmly either on aluminum\brass\copper heatsink, or on the body itself, as it is done in convoy c8, ZL, or skilhunt hxx, among many other lights.
mag's construction is sufficient to run at lower currents, and short time on high current, but it just can't run on full blast for long time. not that you can do it on alkaline cells anyway. i did not find in any reviews or teardowns, whether the drop is triggered by timer of thermal sensor.