Wikipedia harnessed the creative commons to create a massive store of knowledge. It created a fantastic resource for topical learning. However, that resource was not created with fast and efficient sequential learning in mind. WikiBooks and Wikiversity were projects I had high hopes for, but as yet have not succeeded in the way Wikipedia has.
The meta of how to learn effectively was not something I recall ever studying in school, and only recently have focused on. It's hard because different techniques may work for some better than others, and what works for an adult may not work as well for a child.
I eagerly await the gamification of education. Books and videos can be fantastic, but are not the end-all of education. You can't just be given knowledge, you must interact with it, and use it. When I studied basic anatomy, one of the most time-effective methods I ever discovered was using anatomy apps on my phone that made a game of recall. When starting to program, I appreciated websites that included input sections and would compile and run them in-browser. I could practice what I was learning and learn from mistakes as I went. Interactivity works well.
Nowadays I use Anki (https://apps.ankiweb.net/) on my PC and phone, following Wozniak's Rules of Formulating Knowledge (https://www.supermemo.com/en/articles/20rules) when creating my own study decks. I really like using decks created collaboratively by the community, that correspond to an external resource like a textbook. There is power in connecting books and videos to interactive methods of learning like Anki and others. What resources can be synergistically used together in a time-efficient way?
I hope this project curates and collates not just books and video sources but also interactive methods of learning. The idea of using the collaborative commons to create an entire system is intriguing. I hope the concept of valuing resources by time spent and efficiency gets more attention.