The website of the International Dunhuang Project has a section on conservation that features short videos of the processing of beautiful and fragile works, including the Diamond Sutra. I think the clips would be even better with sound, but they’re cool nonetheless. Further down the page there’s a nice glossary of conservation terms. Just in case you want to learn some sweet new words, like friable and orpiment, that will impress people at parties.
Speaking of historical preservation, if you happen to be near the British Museum anytime soon they’re running a special (and free) exhibit on the subject. It features real, live conservators working on artifacts and engaging with visitors, but only lasts until the 26th of October, so don’t delay.