
This is a case of "why didn't they do that a long time ago," but at least it's good news. Google just issued an update yesterday for the YouTube app which fixes one of its most annoying problems. When you film a video with your smartphone in vertical mode, you can now play it back in full screen, instead of a tiny little horizontal window (as shown above in the image).
Right now this fix only works with YouTube for Android version 10.28, but not iOS. Of course, Google still recommends folks stop recording videos vertically.
Source: Gizmodo