I don’t post many of these “best of” lists anymore, though they’re popular, because I’m not sure about sending traffic to these online university sites. However, this one really caught my eye, and is a nice compilation of physics-related TED talks with short synopses:
It’s got luminaries like Brian Greene and Stephen Hawking, as well as an artist (Honor Harger) who creates compositions based on the remnants of the Big Bang.
I could imagine asking students to pick one of these videos to watch, free choice, and write a short essay about it. A nice way to bring popular communication into the classroom.