Here is a link to the Japanning Instructional Series session 1 recording, from January 9, 2021. This video was created by Greg Ricketts (aPlaneLife).
Japanning Instructional Series – Session 1, Supplies and Preparing the Plane
Recorded live. Session 1 of 3 on japanning antique cast iron hand planes. This session covers session logistic, supplies and preparing your hand plane.