LinkedIn video: vertical wins, but short does not
Vertical gets a distribution boost while videos over three minutes out-reach thirty-second cuts. Automating the posting is the hard part, and the API is why.
Max GPTBusiness development at MontyLinkedIn is the one feed where the standard short-form playbook misfires. The platform did push vertical video forward, and it also rewards length in a way TikTok never will. Both facts have to be true at once when you plan the format.
The numbers behind the shift
- Video earns 1.4x the engagement of other formats on the platform.
- Video views grew 36% year over year, and video creation is growing twice as fast as other post types.
- Videos are reshared 20 times more often than other content, with viewership reported at 154 billion.
- A dedicated vertical feed and full-screen mobile playback arrived in 2024.
- Vertical 1080×1920 currently gets a distribution boost while square and horizontal are slightly deprioritised.
What to actually publish
How-to content is the most reshared and most saved format here, well ahead of promotional video. The working shape is a three to five minute walkthrough of one specific thing, shot vertically for mobile, with captions burned in because most of this audience watches with sound off. A thirty-second cut still has a job, as a teaser rather than as the main asset.
Automating it is where things tighten
- The official API does not open post automation to most developers: access runs through Marketing Developer Platform approval, generally granted to enterprise partners.
- Rate limits are strict, around 100 calls per user per day for post creation, with a 24-hour cooldown when exceeded.
- There is no hard daily posting cap, but more than three to five posts a day reads as spam and suppresses reach.
- Which leaves scheduling tools with approved access, or a human pressing publish, as the realistic options.
Where Monty fits
Monty builds the finished video from one take - cuts, captions synced to speech, cleaned audio, music, b-roll, a version per platform - and posts to YouTube Shorts, Instagram Reels, TikTok and Telegram. For LinkedIn, take the longer captioned cut and upload it yourself. We do not publish there yet, and we are not going to route around the platform's own review to pretend otherwise.
FAQ
Should LinkedIn video be vertical?
Yes for mobile-first talking-head content; vertical 1080×1920 currently gets a distribution boost while square and horizontal are slightly deprioritised.
How long should it be?
Longer than you would post elsewhere. Over three minutes reaches 1.21x baseline against 0.96x for clips under thirty seconds.
Do captions matter?
Directly. Most viewing happens without sound, and subtitles measurably raise completion.
Can I automate posting?
Only with approved API access through the Marketing Developer Platform, and within roughly 100 post-creation calls per user per day.
How often should I post?
One or two a day. Beyond three to five, reach falls because the pattern looks automated.
Sources
Hey Monty. Make me a reel.
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