Fix an error on wordpress multisite

Hello, I have a wordpress multisite installation with about 500 client sites on them. They are all duplicates of one site. The error that is happening is when my clients try to go in and update the videos on the site. Once they click update it deletes all of the videos on the page. I have recorded a video of the error in action below. please let me know if you can help. Thanks Video of error: [login to view URL]