I put my tutorials in a library under major group heading…then when I am working on a project that requires a refresh I rewatch them…..
the one set of tuts I need a yearly refresher on is the fundamental of just the basic mesh or sculpt objects….like bevel, etc….
so i appreciate it when CGC group keeps their fundamental up to date within 2-3 rev of the current blender….many improvements have been in incorporating things into modifiers…like the boolean and bevel ….the founded cube is a real god-send….