Hey @SWRoss,
Thanks for posting in the Community!
Per the knowledge base article you linked, as well as the error you shared (thank you for the screenshot - it’s often a huge help in diagnosing these types of issues), it appears the error may be caused by the video’s length. You’ll see here in that article that “when adding a video, it is recommended that each video is less than 1 minute in length.” Because your video is 1 minute and 27 seconds, I’ve venture this is the culprit of the error.
I hope this helps!
Shane, Senior Community Moderator
I’ve come across these errors as well when posting Insta reels. The tricky part is that when you upload a new video within the restrictions, it still shows the error notification at the top of the page. That confused me first, but when you click on publish it doesn’t show the error(s) any more.