[chipuni]

Here's my system, when I want to know something forever:

1. Get a good article or book about the topic. Not a video.

2. Read it multiple times. Each time, highlight and leave notes in the margins. By the third read-through, there's usually nothing more to comment on. (I can't do this with videos.)

3. Turn those notes into new Anki (spaced repetition software) cards that go into the unseen pile.

4. Every day, Anki adds ten cards from the unseen pile to the cards I'm reviewing.

I've been doing this for twelve years, and it works very well for me.