Sister Wendy Beckett, the contemplative nun who talks about art for the BBC, did this 6-episode series on American museums. In each museum, she discusses perhaps 15 works, being pretty careful to get a representative sample. Each discussion is maybe 5 minutes or a little less. Because American museums are diverse, each individual discussion is self-contained, a separable unit.
A note especially for teachers: I find Sister Wendy's comments on painting and on other matters she knows about illuminating and helpful, and I have frequently used video of her programs in philosophy teaching. This American series is useful, I think, in a special way: it allows one to introduce a particular work of visual art into a philosophic discussion as an object of reflection and a resource for ideas, attitudes and feelings. Sister Wendy's discussion opens up the work for further discussion, introduces it, helps people pay attention to it. And five minutes of video is a safe amount in a class; one can use that much without worrying about students going passive.
For everybody else: These tapes are pure pleasure, either as introductions to museums one plans to visit or as booby prizes for those without money or leisure to travel.