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1) Navigate to main stream
2) Add video link
3) Press "Cancel" to not add video to site.
Result1: Video was added to BD and can be found in backend (with no category). But for test site it added to "General" category with ID 1.
May be I should have on life site video category with ID1 (I do not have it)?
Does it depend on something?
May be it's possible to remove invisible video from database?