I recently came across plenty of weird videos with negative durations
firstly 0 seconds: https://cdn.discordapp.com/attachments/397056507243528203/739081902278836234/short_video.webm
And negative duration: https://cdn.discordapp.com/attachments/397056507243528203/739081962211377152/CorruptFile.webm
I tought it was a trick with webms but there also is a mp4: https://cdn.discordapp.com/attachments/397056507243528203/739081981643718687/video0-21.mp4
I would love to know how I can make videos like these