I really like this two-post series by Daniel Martin at Keep It Simple Activities: how to exploit those vocabulary videos by Hugh Dellar and Andrew Walkley. This post has examples of generic speaking questions and extension activities; and this one suggests how the videos can be used for micro-writing activities: use keywords to predict the contents, watch the video and compare the ideas. Very practical and efficient, with immediate feedback built into the activity and no preparation required. One more thing – it’s great to focus just on the language sometimes, without bringing in all kinds of non-linguistic and sometimes really unnecessary information.
I suppose something similar can be done with those little BBC Radio podcasts about contemporary vocabulary (The English we speak). They are a bit longer and require focused listening, but why not?