TEFL clips (see for example clip two, the Blue Whale)

Some easier material can be found at Real English Links

The following might also be useful

Academic exercises (mainly vocabulary, and I don't like the advertising too much ...)

Some (difficult) outreach lectures with video of the lecture and Power Point slides (University of Texas)

Some good or amusing - or good and amusing - youtube clips :

The moonwalking bear, Guardian advertisement "full picture", "What are you sinking about?", "Sorry, I don't speak English. "