Long videos and video quality

Short or long?

Your video	Counts as	Goes to
Up to 3 minutes, vertical or square	Short	Every destination
Over 3 minutes, or landscape	Long	YouTube, Facebook, LinkedIn and backups

Destinations that only take short videos skip a long one with a reason such as “Instagram only takes short vertical videos”. That is a skip, not a failure. If no destination takes it, the post shows “Not posted” with “No destination takes long videos”.

Limits

• Length: up to 2 hours.
• Resolution: up to 4K (3840 or 4096 by 2160, either way round).
• Per platform: each destination has its own limits. LinkedIn takes videos up to 30 minutes, for example, and Facebook Reels up to 90 seconds, with longer videos posted as regular Page videos. A video outside a destination’s length range is skipped there with the reason.

Uploading a long video takes longer. The post shows “Posting, usually a few minutes” until it is done.

Video quality

Post Once fetches the best version of each video it can:

• Instagram Reels are fetched at 1080p where available. Instagram’s API only provides a 720p file, so Post Once uses that when the 1080p version cannot be fetched.
• Re-encoding happens only when a destination needs it, such as a file over its size limit or in a format it does not accept. YouTube usually gets the original file as it is.
• Backups keep the original file. A video is converted to H.264 only when the platform served another format, so the backup opens anywhere.