@TeamYouTube Well, something is broken down here.
>upload mp4
>failedpic.twitter.com/FaIbzHvjD1
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
Just to confirm, do you see any specific error? Also, try checking this troubleshooter which covers common uploading errors and how to fix the issue: https://goo.gl/Q9UCB8 . Let us know if that helps!