I am grateful for this pointer from Sarah Cove, Art Conservator, Arts Society Accredited Lecturer and Falmouth Member for pointing out his series of films from Philip Mould.
She says:
"Each film lasts approx. 15 minutes and they are really excellent. I was recently in touch with Philip regarding a pair of Constable portraits that have recently come to light (one in Cornwall no less) and he was in the middle of filming."
https://philipmould.com/news/40-art-in-isolation-all-episodes-series-catch-up/
A full list is available there.