The Reelspan blog
Cross-posting
Cross-posting one video to TikTok, YouTube, Instagram, Facebook, X, LinkedIn, Threads, Pinterest and Bluesky is mostly the same job nine times, except for the parts that aren't. A field guide to what changes per platform: shape, length, captions, privacy, scheduling and AI labels.
5 min read
Video specs
Which video shapes TikTok, YouTube, Instagram, Facebook, Threads, X, LinkedIn, Pinterest and Bluesky accept, which one each prefers, and how to make one master video work on all of them.
5 min read
Automation
Most n8n templates for posting video wire up each platform's API on its own, with its own app review, tokens and limits. A simpler workflow sends the video once to a publishing API and lets it reach every platform. Step by step, with the HTTP Request node.
8 min read
Cross-posting
Posting a TikTok as a Reel or a Short is mostly the same video with a few changes that decide whether it works: the watermark, the music, the length, the caption and the cover. A step-by-step checklist, based on what each platform actually says.
7 min read
Automation
Instagram, TikTok and YouTube each have a built-in scheduler, with different rules on who can use it, how far ahead you can schedule and what doesn't work. Step by step for all three, from their own help pages, plus when a cross-platform scheduler makes more sense.
6 min read
AI agents & MCP
The Model Context Protocol lets assistants like Claude and ChatGPT call real tools, including ones that publish to social media. How it works, how to connect a publishing server, and the guardrails to put in place before an agent can post for you.
4 min read
Social media APIs
Instagram's API can publish Reels, but only to professional accounts, through a container-then-publish flow, and only to accounts you manage until Meta's App Review. A practical guide to both login paths, the specs and the daily limit.
5 min read
Video specs
The real caption, title and description limits for Instagram, TikTok, YouTube, LinkedIn, X, Threads, Pinterest, Facebook and Bluesky, checked against each platform's own pages, and why a scheduler sometimes cuts off a caption the app would accept.
8 min read
Video specs
How long a video can be on TikTok, Instagram Reels, YouTube Shorts, Facebook, LinkedIn, X, Threads, Pinterest and Bluesky in 2026, from each platform's own pages, including the YouTube rule that blocks some Shorts over one minute.
7 min read
Social media APIs
Every post from an unaudited TikTok app is private, and at most five people a day can use it. Here is what the Content Posting API audit checks, and the Direct Post screen TikTok requires before it lets your posts go public.
5 min read
Social media APIs
The YouTube Data API's upload quota changed twice in the last year, and on 2 November 2026 Google lifted the private-only lock on unverified projects. What an upload costs now, how many videos you get a day, and what still needs an audit.
6 min read