Old learning materials are still viable?

Hello guys, I want to master blueprint visual scripting and I was wondering if the old learning materials(like UE4 Official YouTube channel blueprint series from 2014/2016) are still viable now?
If you know a site, a youtube channel, or anything you consider a good source of information and inspiration please let me know.
P.S: I finished the blueprint tutorials on (so I am looking for something else).

Yes, they are still very viable.

I always liked the WTF? series for quick and easy explanations on almost everything BP related in UE4. At video 107 on the list is the basic Material explanations.

Link =

Thank you both!