You mentioned Bobby White. I would say that Pablo Cimadevilla has to be mentioned as well, impressive pieces and great technique. Both of them feature excellent video editing skills.
If you want more than jewellers making jewellery videos, you can also get explanations and theory in Jaco’s Youtube channel: Goldsmith’s Workshop Secrets (jacothejeweller).
Some of my favorite old books you might check out (if you haven’t already) are Herbert Maryon’s “Metalwork and Enamelling” (He restored some of the Sutton Hoo treasure for the British Museum) and “On Divers Arts” by the monk Theophilus. Both are available from Dover publishing.
Chad’s Silversmithing is pretty good too. His process is interesting in that he doesn’t seem to fiddle with very fine motor skills but still makes interesting and nice-looking things.