Under Admin -> Attachments, set the maximum file size to something that is ok for documents, but useless for video. This won't stop it, but your users won't be able to upload videos of much use.
If that's not going to work for you, then you need add-ons that can scan and refuse attachments - there's a couple in the marketplace, have a look for them.
Hi Community! I’m Elaine, Confluence Product Manager. You may have read my earlier post about page tree in space navigation sidebar. I'm excited to share another improvement that helps you organize ...
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