From Electric English...
I find that KWLs work well with videos. The students can still mostly watch and absorb the visual dynamic of the assignment but still be required to assess for themselves what they have absorbed. It's a great little formative assessment for you too, should you choose to use it as such :)
This is a series of 5 KWL charts to use in conjunction with any John Steinbeck biography. I, personally, use A and E, "John Steinbeck" An American Experience", but there might be other