4kiphoneyoutube
iPhone 7 Plus can take 4k videos, but if you click on the Photos app and upload to YouTube, for some reason it is limited to 240p. If you click on the YouTube app and upload, then it is 1080p.
Is there a way to upload directly from iPhone to YouTube in 4k resolution?
I think one way that will work is to transfer the video to the computer first, and then transfer from the computer to YouTube, but is there a way to directly do it on the iPhone, I wonder.
What I would do is go directly to the Youtube app (I am testing this with my old 3GS so this should work) and drag to the left to access all of the different menus, then click on the little up arrow next to my channel (assuming you are already logged in on the app) and then you just click on the video you want to upload instead of using the photos app and 'sharing' to Youtube. You could also try logging in to Youtube on a computer as on there it should give you the option to create a new Youtube account with your Gmail assuming that the cause of the problem is that your gmail is not tied to any Youtube. Assuming it let you create a new Youtube associated with your Gmail you should just be able to go back to the app on your iPhone and try again.
Did you try the YouTube iOS app? You may need to change a few settings first, but I believe the YouTube app supports full quality videos - including 4K. Apple's built-in uploader from the share menu doesn't work that well.
In the YouTube iOS app, click your user image, then on the window that slides up, select Settings. Scroll down to uploads and confirm that full quality is selected for upload quality. Press the X on the top left to return to the main part of the app.
You may now press the camera button (next to the search button) on the top bar. It will ask for appropriate permissions. Try uploading from there and see if it works for you.
(I just tested this method and can confirm HD+ resolutions - also, I just noticed that this was a really necro'd post.)
Best Answer
This is a limitation of Apple's Photos.app as of iOS 10.3.1.
Photos.app limits video uploads to 720p/1080p.
To upload 4K videos from your iPhone to YouTube you can use Apple's iMovie for iOS. iMovie for iOS is free for all users since April 18 2017.
Unfortunately you have to use a second app to accomplish a 4K upload.