Let's consider the things that TED Ed asks the learner to do: watch a video, take a multiple-choice quiz, write brief constructed responses, and read through a bibliography. If I took the name TED out of this scenario, I would suggest that many educators would say that this format is exactly the type of traditional assessment that project-based, inquiry-driven, personalized learning is at odds with.
It is perfectly fine to watch a video. It is perfectly fine to view a lecture. It is perfectly fine to quiz yourself on what you remember from the video or the lecture. It is perfectly fine to write a brief response about a big question. But let's not call that a lesson. That's just a starting point.