CREATE TRIGGER `Delete Video` AFTER DELETE ON video 
FOR EACH ROW 
BEGIN 
DELETE FROM usersalbumsvideo where id_video = OLD.idVideo; 
DELETE FROM categorytovideo where idVideo = OLD.idVideo; 
END

Название полей правильное. Ошибка на строке 4

1064 - You have an error in your SQL syntax; check the manual that

corresponds to your MySQL server version for the right syntax to use near '' at line 4