If some people, including yourself, rely heavily on Youtube to work on a project or share an interest, everyone can collaborate more efficiently by sharing playlists. Below is the how-to guide to do this.
https://support.google.com/youtube/answer/6109639?hl=en
Needless to say, unless you are members of the same family group, you cannot share private playlists. The shared playlists must be either Unlisted or Public.