I ran into this one a few days ago.
It's from Julian Baumgartner, a fine art restorer/conservator in Chicago. He takes us through the process of cleaning and restoring an oil painting, narrating what he's doing step by step. The thumbnail gives some indication of the dramatic change that's possible. There are also a surprisingly wide range of skills involved, all described in a clear, calm voice, with occasional gentle humour.
Overall, this, and the earlier videos on the same channel, are strongly recommended if you want something simultaneously calming, informative and uplifting.
