The users will at least get the same view as the person who shot it in the first place. Previously, YouTube would display vertical videos in full-screen landscape mode which kept the actual viewing area nearly as small as the preview screen.

Earlier this week, the Android version of the app was updated to make playback of the vertical video a better experience.

Google-owned YouTube is seeing accelerating growth despite competition from Facebook and others in video, YouTube chief executive Susan Wojcicki said Monday.

Asked about her three top priorities, she said they were "mobile, mobile and mobile," and said the company was working to make the experience better for people watching on smartphones and tablets.

Wojcicki also said YouTube will make a public launch of its subscription music service later this year after beta testing.