While YouTube Shorts are typically created in 9:16 format to share videos narrower than a square, the best engagement and visibility are often gained from videos that are displayed on full screen. Allowing the audience to use all of the screen for watching the YouTube Shorts content results in higher likes and views for creators.   If you’re a content creator who wants to grow your YouTube channel with YouTube Shorts, the best dimensions for YouTube Shorts are 9:16 and anything narrower than a square. This way you can create more compelling content for your YouTube channel.