I wish freedom of expression were GPL-style freedom instead of MIT-style freedom, e.g., "You're free to express whatever opinions you want. You may not keep others from expressing whatever opinions they want."

YouTube is a company. Freedom of speech only applies to individuals and communities of individuals.

EDIT:

elliekelly, I can't answer because I am being rate limited and can't write new comments on HN.

You have surprised me, but it is sadly true: https://en.wikipedia.org/wiki/Citizens_United_v._FEC

One would think. But corporations are people and have first amendment rights thanks to Citizens United.