I have also noticed an error in instant articles on the New Page Experience pages, at the moment we insert a video in the .mp4 format into the article, the article goes to unpublished or to Draft.
We have to use other alternatives like YouTube to show the articles with videos.
If anyone from Decode wants to demonstrate through videos or even through Teamviewer, please contact me via email [email protected]
I hope we can fix this mini problem.