Series Editor discontinued August 2019
We decided to discontinue the Series Editor beta. The Series Editor beta was only available to a small number of creators and wasn’t frequently used. We’re removing it to focus on other features for creators.
You can still create playlists and add series metadata to videos to help viewers watch your videos in order. For example, you can add “S2E3” to the end of your video title, or to your custom thumbnail, to tell viewers that your video is an episode in a series. Learn more about playlists on YouTube.