Prior to the free Summer 2015 updates, you were required to manually select "Encode for Mobile" for all your public videos that you wished to be available for viewing on mobile devices. After updating your account to the free Summer 2015 update, this feature is done automatically for all public videos. If you have not updated your account for the free Summer 2015 updates, we recommend you do so as there are a number of other important features included in this free update.