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.
We are a small non-profit focused on open education; everything is open to browse at https://learn.saylor.org so it's easy to get a sense of what one can expect from our courses.
Topics include CS, business, art history, bio, chem, physics, poli sci, economics, and a few others, comprising about 100 courses in all.
And for anyone who wants to hack on their own, we have about 200 inactive courses that can be forked on GitHub: https://legacy.saylor.org
We are a small non-profit focused on open education; everything is open to browse at https://learn.saylor.org so it's easy to get a sense of what one can expect from our courses.
Topics include CS, business, art history, bio, chem, physics, poli sci, economics, and a few others, comprising about 100 courses in all.
And for anyone who wants to hack on their own, we have about 200 inactive courses that can be forked on GitHub: https://legacy.saylor.org