It's helpful to use -i, --ignore-errors When doing that. By default, if a playlist contains a single video that's no longer available, youtube-dl will st

It's helpful to use -i, --ignore-errors When doing that. By default, if a playlist contains a single video that's no longer available, youtube-dl will stop downloading the playlist when it hits that video. When playing a youtube playlist in mpv with youtube-dl, sometimes --load-unsafe-playlists is needed. This is rare however.