Not quite.  Premium videos do not get a row in the image table, so the only place to find their add date is the video_info table's 'added_at' column.  Additionally, this 'added_at' is for when it was added to the local wiki, *not* the ingestion date into the video wiki.

All video, premium or otherwise, should have a video_info row, so I would prefer we use this information all the time.  However, there are some inconsistencies in the data due to how and when the video_info row is created.  When these get cleaned up I would recommend using this for all video.