YouTube™ Flash® Video Player is a powerful tool that will let you choose Flash video player as default YouTube video player. All YouTube videos will play in Flash player automatically which have more high resolution ( HD ) options than HTML5 video player. You can also choose HTLM5 video player as default one from add-on settings. MultiProcess Firefox Electrolysis is supported. YouTube™ Flash® Video Player is a helper tool for YouTube™ users. YouTube™ Flash® Video Player is not officially affiliated with YouTube™ or any YouTube™ products or Flash® or any Flash® products. YouTube™ is a registered trademark Google Inc and Flash® and Flash logo® (“the Flash logo”) are registered trademarks of Adobe Inc. If you have any support questions, feature requests and bug reports, please do not hesitate to contact us by below support email address: support at barisderin dot com Best Regards, Baris Derin