I think these are one of the things that I need to understand well, and that has given me a little headache for not knowing exactly how it works.

Is it mandatory to keep underscore between Suzanne and rig? Can't we keep space between them like Suzanne rig and not keep it like Suzanne_rig?

Hello, this video doesn't work!

Thanks for the great introduction. Unfortunately, symmetrize didnt work when I tried to mirror the bone with it.  Symmetrize simply did nothing. So the whole construct kinda collapses and only partially works.