Go to "Video" menu on the left. Choose "Video List".
Choose one of your video from the list you want to analyse and press on it.
Find menu button on the left up corner and choose "Playlist".
Choose playlist you want to hide. Press settings icon and choose "Hide".
If you want to unhide playlist press "HIDDEN PLAYLISTS" down the playlists list, choose playlist you want to unhide. Press drttings icon and choose unhide.