SELECT
    t1.id video_item_id,
    t1.name video_name,
    t1.description,
    t1.averge_star,
    t1.study_video_items_count,
    t1.link,
    t1.created_at,
    t1.updated_at,
    t2.cover_url,
    t2.file_url,
    t2.play_url,
    t1.video_id
FROM
    video_items t1
LEFT JOIN 
    `videos` t2
ON 
    t1.`video_id` = t2.`id`
WHERE t1.`video_id` IS NOT NULL