Let's be real for a moment. I just looked it up and found a playlist for the full Handmade Hero series which contains 696 videos. Adding up the total duration of the playlist gave me a time of 4726711 seconds, or 1313 hours.

Even for the most passionate of developers, you're gonna have a hard time getting someone to commit even a fraction of that time towards educational content.

If you think there are any specific videos from the Handmade Hero series that are really worth watching, you should recommend them directly. But pointing someone to 1300 hours of content is an absurd suggestion.

You don't watch the full playlist from start to finish. You start and keep watching until "you get it". Most of the foundational stuff is of course at the beginning. Feel free to pick the topics you find interesting, like allocations, etc.

There's a sizable community around Handmade Hero which can point you to more specific topics.