You're using the latest version of iTunes? Because I have my main computer on a latest version and a virtual machine running an iTunes 10.7.
Unfortunately, this method will not work anymore since iTunes Apple Support updated that 1080p Full HD videos will fail to play with iTunes 11.0.1 and below. And also, iTunes 10.7 will not download 1080p Full HD videos even if the setting is set to 1080p preferred. Link: https://support.apple.com/en-us/HT207408
@leonardol4e92 Open Teamviewer and I'll show you for 1080p FHD as FHD can't be used on Requiem 4.1 anymore. P/S You have to have something BOUGHT on your iTunes account before I can show you.
Requiem 4.1 renders a new untouched lossless file by reverse engineering its DRM. But now, you can only run 720p HD and 480p SD through that software. Full 1080p HD no longer supports the un-DRMing due to the player restrictions.