I like this first video because Its very straight forward and get straight to the point of how to roller skate at a beginner level.
Also he show you some ways to stop which is helpful because when I first started roller skating I couldn't really stop on my own so him showing you how to stop is really helpful if you don't know how to already.
This is also another good video it gets right to the point and is very striaght forward this one talks more about balance and how to skate more than the other video which I like. This video also talks about getting up which is very helpful because you will fall down alot when you roller skate whether you want to or not and knowing how to get up is needed.
This video is for more advanced skaters but I just wanted to put it here for people who want a challege or for those who want to learn this trick. Diamond walker has some great videos about multiple other different tricks and about jam skaing.
Diamond Walker's Channel
Another video from the diamond walker this talks about spins which is hard to learn but become easier with time. Spins are not as hard as grape vine to learn but still a cool trick to learn.