A couple of short parts of videos about Da vinci for art enthusiasts. An introduction on his life and a little more details about the mystery of his 2 paintings; the Last Supper and the Mona Lisa. Simple questions about the heard material that also generate future discussion on the topic.
The Mona Lisa BBC documentary is much longer, students can watch it at home if they are interested in it. BBC has a lot of great documentaries on art.