The documentary Herculaneum Uncovered is available to watch online - it seems to have been there for some time, but we've only just noticed!
This episode is one of a series called Secrets of the Dead, and is described:
Near the fabled Pompeii is Herculaneum, another city buried and frozen in time by the eruption of Mount Vesuvius. Herculaneum Uncovered follows geo-archaeologists as they unearth precious artifacts that reveal what life was like before the eruption, and how the volcano devastated the town in a very different manner to Pompeii.
While the aerial views are particularly worth watching for, do take some of what the narrator says with a pinch of salt though, as usual TV is not always accurate. My favourite part is where the eighteenth-century Bourbon excavators are called "ancient tomb raiders"!