Definition
Vertical video (9:16)
Video shot or generated in portrait aspect ratio. The standard for TikTok, Instagram Reels, and YouTube Shorts.
Vertical video — 9:16 aspect ratio — is the standard format for TikTok, Instagram Reels, and YouTube Shorts. It fills the screen on a phone held in portrait orientation, which is how most people watch social video in 2026. AI video models can generate directly in 9:16; in VIBE, the aspect ratio is a setting in the prompt screen. Horizontal video (16:9) is still the standard for YouTube and most landing pages.
Related terms
Make AI video inside VIBE
19 AI video models. Free starter generations. iPhone, Android, and web.