I forgot how to add another video to my playlists so I looked it up.

1. Find a video you want in the playlist.
2. Under the video, click Save.
3. Select Watch later, Faves, or a playlist you've already created, or click Create new playlist. If you 4. Create a new playlist, enter a playlist name.
5. Use the drop-down box to select your playlist's privacy setting. ...
6. Click Create.

Not that anyone cares but here is one of my playlists:

https://www.youtube.com/playlist?list=PL2471BE36ED58ADEF