social-media-skills/cross-post-video-skill

Cross Post Video Skill is a free, open-source skill that lets your AI agent cross-post one video to TikTok, Instagram Reels and YouTube Shorts in one go. The agent checks the file against every platform before anything is uploaded, picks a cover, writes a separate text for each platform, asks the settings only you may choose, shows you every post on one page, and then posts or schedules all of them through WoopSocial after you say yes:
one file checked against TikTok, Reels and Shorts at once: length, size, frame rate, shape, codec, colour, sound and file layout;
a re-encoded copy when the file needs it (4K, 120 fps, 5.1 sound, MOV from a camera, HDR when your ffmpeg can convert it), with the original left alone;
a cover picked from a sheet of frames, with the part Instagram's profile grid shows marked on it;
a text per platform: TikTok caption, Reels caption, YouTube title, description and tags, each counted the way that platform counts;
the settings platforms require the account owner to choose: who can see a TikTok, comments, duets and stitches, YouTube made for kids, AI and promotion labels;
one plan page with every account, text, setting and time, and one yes before anything goes out;
all accounts in one request, now or scheduled, several accounts per platform if you have them;
a ready page with text and steps for every account you'd rather post by hand.
No watermark, nothing added to your video, no paid API needed to prepare everything. Python and ffmpeg. MIT licensed.
bash
npx skills add social-media-skills/cross-post-video-skill -g -a claude-code -y
Post it from your agent: make a free WoopSocial account (2 social accounts, no card). TikTok, Reels and Shorts are 3 accounts: on the free plan the agent posts 2 and gives you a ready page to post the third by hand. Everything before the upload works without an account, and you can also post all of them by hand with nothing to sign up for.
From the example in examples/microgravity/: a NASA clip about why astronauts exercise in space, planned for TikTok, Reels and Shorts. Every file in it was made by the skill's scripts. See CREDITS.
## Contents
What the cross post video skill does
Requirements
Install
Example: cross-post a video with Claude Code
What gets checked
One video, three texts
Posting and scheduling
FAQ
What's inside
## What the cross post video skill does
Tell your agent "post this video to TikTok, Reels and Shorts", "cross-post clip.mp4 everywhere tomorrow at 6" or "upload this to all my accounts", and it does the whole job:
1. Asks in one message which accounts, when, the settings only you may choose, what the video says, and four things it can't see: is it the original export you have the right to post, what the sound is, whether it is AI-made, whether it promotes something. If a job file is already there, it reuses your accounts and settings and only confirms them.
2. Checks the file with check_video.py against every platform at once, and writes a fixed copy with --fix when a re-encode solves it.
3. Picks a cover with cover.py: you choose from 12 frames.
4. Writes a text for each platform, from what the video says.
5. Writes the job (crosspost.json) with your settings for each account.