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How to post a finished video to social accounts safely with Reelmimic

Dry-run and then schedule a passed ReelMimic video to TikTok, Instagram and YouTube via Upload-Post.

  • Content
  • Advanced
  • 1 hour 15 minutes
  • From the README
  • Any agent

Authorization notice. Reelmimic is dual-use. Only use it on software, sites and systems you own or have explicit permission to test.

Account pooling. Posting uses your Upload-Post key and the social accounts linked to it, so only publish from accounts you own or are authorized to use.

Credentials. UPLOAD_POST_KEY grants posting access to your connected accounts, so keep it in the secrets file and out of shared logs.

Who it is forA creator who has a finished ReelMimic video and wants to publish it to several social platforms on a schedule.

The problemUploading the same video to several platforms by hand is repetitive, and a mistaken post is hard to undo.

The outcomeThe video is scheduled to the chosen platforms at the chosen time, after a dry run confirmed what would be sent.

What you need first

  • Node.js 22.18+
  • Python 3.10+
  • FFmpeg
  • Chrome
  • Claude Code or Codex CLI, installed and logged in
  • Rights to the reference video and to any output you publish

Steps

  1. Set UPLOAD_POST_KEY and UPLOAD_POST_USER in ~/.reelmimic/secrets.json, and add the Upload-Post account you plan to use.
  2. Confirm the project's final review passed in the Production line tab, since the command skips projects that did not pass unless you use --force.
  3. Run npm run post-video -- --platforms tiktok,instagram,youtube from the app folder as a dry run and read what it lists. (inferred, check the README)
  4. Run the same command with --at, --tz and --send added, for example npm run post-video -- --platforms tiktok --at 2026-10-05T18:00 --tz Europe/Madrid --send, once you are happy with the dry run. (inferred, check the README)
  5. Check the scheduled post on each platform, and rerun the same command only if you want a repost, since the tool does not post the same video twice.

Prompt for your agent

In the reelmimic repo app folder, run `npm run post-video -- --platforms <platforms>` as a dry run for the project <project name>, then review the listed output. Expected output: a dry-run summary of what would be posted, with nothing sent. Verify the output before adding --send, and only send if the project's final review passed.

Caveat. ReelMimic never posts by itself, and nothing leaves your computer until you add --send to the post-video command.

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