It has been often said that when Google redesigns a product, features are often removed. A good example of this would be the material Google Maps release, where a lot of 'classic' features of Maps were absent. Said features do, however, get added back in, and today one returns to Google Photos after being left out of the Google+ Photos split: rotating video.
As of version 1.25 (we can't find it on any version earlier than that, although it may exist) the ability to rotate a video at 90° intervals is a feature in Google Photos. To do this, select a video and choose to edit it.Read More