On 2016-09-01 02:00 UTC, we identified an issue with the POST accounts/:account_id/tweet endpoint when using the video_id param in combination with video media uploaded by another user.
This only impacts videos that are uploaded using the POST media/upload endpoint when the additional_owners parameter is set and only when one of the other owners tries to use that video when creating a promoted-only tweet.
Please note that our teams are engaged and working toward resolving this as soon as possible.
We will follow up once this is resolved. We apologize for any issues this may have caused.
Twitter Ads API team