The problem is that it's nearly impossible to remember the correct way to tie a specific knot in a given situation unless you do it frequently. It's always best to have a cheat sheet as part of your (e.g., camping) gear. So once, you get the YT recommendations that you ask for (and you will), take physical notes!

I keep a short length of rope around the house where I occasionally pick it up and practice some knots. If you rely on them to protect yourself like in climbing they needs to be memorized to the point where you can tie them in the dark.