You can't go wrong to start at the learning path. The videos are well structured. So if you don't know what you're looking for just start at the top. There is also a list of top 5 videos by a lot of the coaches on RIO. So every coach list there top 5 videos on the site. These should be good too.

Welcome ownuachi0!

There‘s definitely lots of value in watching videos before 2015 as well and whenever you come across one that interests you don‘t shy back from watching it. When studying with the learning paths you will also automatically consume a mix of older and recent videos.

HOWEVER, I‘d suggest you to not feel obliged to start out with the very first videos for chronological reasons like one would do when starting a new book. You can safely tinker with newer videos first and from there I‘m sure you will meet some favorite coaches and check out their older videos at a later point or likewise when you will aim to study certain concepts you will automatically capture the most valuable videos of the complete library in the process.