How to cross-post short-form video without re-uploading three times

Posting the same vertical video to three platforms by hand means three uploads, three captions, and three chances to forget one. Here is how to make it a single step.

Compose once

Write your caption, pick your cover, and set your video a single time. Everything that is shared across platforms should only be entered once.

Publish everywhere

With verticast you publish to TikTok, Instagram Reels, and YouTube Shorts simultaneously — no re-uploading, no copy-pasting captions between apps.

What to watch for

• Keep the video vertical (9:16) so it fits every platform’s safe zone.
• Mind the length limits, which differ slightly per platform.
• Review the post on each platform after it goes live.