I'm trying to sort my playlists into playlist folders but it is virtually impossible for me using the 'drag and drop' method, given i've a lot of playlists and to drag the ones wayyyy down my list back up to the folder I want them in is so tedious.
Is there a way of adding a playlist to the folder without having to drag and drop?
Yes. Go to the folder where you want to move the playlist and create a new one (you can even use the same name). Then go to your existing playlist you wanted to move, highlight all the songs, right-click and save them to the new playlist you created in the correct folder. Delete the old playlist.