I just uploaded my first gopro video on YouTube. I mainly uploaded it for family and I think it turned out fine for what I was trying to accomplish. I used iMovie on my Mac and uploaded directly to YouTube from within the application. I uploaded in 720 HD and it worked fine, but my family is only able to view the video on a computer and not their mobile devices (iPads, iPhones, etc). What settings do I need to use within iMovie to upload in a format where anyone can see it regardless of source and in HD? Thanks in advance.