It's from the BBC (that's a good enough reason to share for me) and there are some great stories being told in the documentaries from social commentary, to war, to poetry.
I love the idea of students getting applicable content from multi-media sources on their own and incorporating it into their thinking. Also, a great way to introduce students to the nuances of digital storytelling.
Lapham's Quarterly, A Magazine of history and ideas. Great social studies source. I like the Friends, Lovers, and Family story/chart that shows the relationships between different artists across time. Always looking for ways to show how what one person does impacts others and not just in art!