It adds buttons into youtube and right click on the menu but, tried to open the youtube playlist and it didn't work.

Additional info: How to we add a playlist? You say click on the buttons but they are just for a single video. I dragged and dropped a playlist link into Potplayer and it didn't work. Right lick on a playlist link and selection open in Potplayer, didn't work neither. I'm using the latest version of Potplayer.