Ted-Ed has the video How did Hitler rise to power? by Alex Gendler and Anthony Hazard.

Decades after the fall of the Third Reich, it feels impossible to understand how Adolf Hitler, the tyrant who orchestrated one of the largest genocides in human history, could ever have risen to power in a democratic country. So how did it happen, and could it happen again? Alex Gendler and Anthony Hazard dive into the history and circumstances that allowed Hitler to become Führer of Germany.

I can’t attest to the detailed historical accuracy of everything in this video, but it sounds about right from what I have learned from other sources. There are a few details that add to what I already knew.