Can't create Video instructable Answered
I'm trying to upload a video instructable as a 'preview' to my V2 instructable of something.
I enter a title, I enter a body text, I enter a youtube video URL, and I uploaded a thumbnail image, yet when i click save, whether or not the information fields are filled out , it says "There's been a problem updating your Instructable. Please refresh this page."
How to fix and upload this video intructable?