Vertical video (9:16)

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.