If you set the skins in the Media panel in InDesign on your video, they will have no effect in Publish Online or when creating a Fixed Layout EPUB file.
That's because the "skins" feature is built to use Flash-based skins. They only work if you're creating a SWF file (which is, of course, Flash).
When creating output for Publish Online and EPUB use the EPUB Interactivity Preview, not SWF Preview.
Thanks for your help. You'll see in my screen-grab that I am indeed using the EPUB interactivity Preview, which show the fullscreen icon. When published online, that icon is not an option. Am I missing something?
Having the same issue. did you find a solution?
Publish Online doesn’t allow any other embedded website to go full-screen due to security reasons. Hence you are not able to go full-screen with this video.
As a workaround, you can insert a hyperlink taking it to youtube.com for users who want to view this video in full-screen.
Thanks and Regards,