YouTube Premium now supports 1080p downloads on iPhone.
Redditor swaroop4s posted on the social news aggregation website a screenshot from their iPhone with the ability to download content in 1080p. Previously, users could only download videos in 720p resolution.
Additionally, we checked our in-office iPhone with YouTube Premium and it did not have the feature available on it yet, either. It’s possible that it’s not available in Canada, though there’s also a possibility that it’s a gradual rollout.
We’ve reached out to Google Canada for more information.
However, let us know in the comments below if you see the 1080p download quality option.
Source: Reddit (swaroop4s)
Update:02/08/2019: YouTube Premium now supports 1080p downloads on Android as well, according to Android Police.