A security researcher has discovered a critical vulnerability in Facebook that could allow attackers to delete any video of the social networking site shared by anyone on their wall. The flaw has been discovered by security researcher Dan Melamed in June 2016. Facebook has since patched the flaw and rewarded him $10,000 bug bounty for his efforts. The vulnerability allows attackers to remotely delete videos shared on Facebook without having any permission or authentication but also to disable commenting on the video of your choice. Facebook responded to the vulnerability with a server error, but the new video was successfully got posted and displayed just fine.
Source: https://thehackernews.com/2017/01/delete-facebook-video.html