http://www.unadinoi-winx.com/rainbow-just-put-%e2%80%9cmystery-of-the-abyss%e2%80%9d-on-youtube-12240/ that the official English Winx YouTube channel has put up the 3rd movie, Secret of the Abyss (which had previously been available on Netflix)
https://www.youtube.com/playlist?list=PL8emVvNIujHjT0AeqkH5fZhlHgwdjvsaa during the run up to the holidays: 3 episodes from season 7, plus one episode from each season of World of Winx
Thanks for the information