How long has this been happening and have you taken a look at this troubleshooter yet: https://goo.gl/Q9UCB8 . The troubleshooting guide covers common uploading errors and how to fix them.
@TeamYouTube I'm trying to upload a video and I keep getting a message saying the file isn't valid, despite it being an MP4 file, any ideas?
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This is the first time I’ve had this. This is the message I’m gettingpic.twitter.com/GUGkrvxS49
End of conversation
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Try placing the file in your recycle bin and then clear the bin!
Thanks. Twitter will use this to make your timeline better. UndoUndo
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