Is anyone else having this problem? I shoot and edit 1080p high-definition footage and I load it into the recently-updated iMovie 10.1.5 to edit it, but when I try to directly upload it to YouTube, I only get options for SD 480p and Large 540p! I know it must be something with the YouTube uploader, because when I checked the Export File options, the high-definition options (720p 60 and 1080p 60) DO show up. So far I was able to work around this by exporting the project to Final Cut Pro X, and with its' 10.4.9 update, THAT can still upload to YouTube in HD, so I know it's just a problem iMovie has.