Which of the learning/lecture services are the best?

I’ve been interested in learning some new trades, specifically stuff that can help me in my television career as an editor… But I’m also a fan of history and writing, so I’d like to learn more in those areas as well.

I know there are a BUNCH of self-learning lecture services online, such as:


But I really want to know which are the best. I’m sure Waypointers have dabbled in a few of these sites, and I’d like to know your experiences in what stood out to you about these services.