I have seen that many online educational videos tend to assume that you have some experience with bench work. Many also assume that you have access to tools. Lots of tools. Very expensive tools. This was a pet peeve of mine when I was just starting in the 80's and it seems that nothing has really changed.
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This video shows how to make a basic, but often used tool at the jewelers bench. The sanding stick. You should make several of these in different grits of paper.