If you are about to teach the second conditional, you might like to try showing this presentation because it contrasts them in a way students might benefit from. In the end students watch a short video segment and use the structures to say whay they would do and what the actor will do. Students watch the rest of the segment to check their guesses.
You can find other movie segments on movieclips
E - writing for an authentic audience takes place when you ask your students to add a short quiz about the segment they've watched on movieclips.com