Saylor Academy (disclosure: I work there), mentioned also by StrawberryPi on this thread, consists of free content curated into complete certificate courses. Video makes an appearance, but does not dominate.<p>We are a small non-profit focused on open education; everything is open to browse at <a href="https:&#x2F;&#x2F;learn.saylor.org" rel="nofollow">https:&#x2F;&#x2F;learn.saylor.org</a> so it&#x27;s easy to get a sense of what one can expect from our courses.<p>Topics include CS, business, art history, bio, chem, physics, poli sci, economics, and a few others, comprising about 100 courses in all.<p>And for anyone who wants to hack on their own, we have about 200 inactive courses that can be forked on GitHub: <a href="https:&#x2F;&#x2F;legacy.saylor.org" rel="nofollow">https:&#x2F;&#x2F;legacy.saylor.org</a>