I was up watching TED Talks till around 3 in the morning last night.
I'll make sure to post some of my favourites when my internet is properly renewed. (may have spent the last of the download on watching TED Talks <w<)
But I remember watching the top video you've posted, it's probably one of my favourites overall.
I love the sheer variety and volume of topics. And they are all so interesting!
I also enjoy The TEDx, which are usually small independent conventions.