I would guess they’d get through the videos within a couple of weeks. There aren’t that many auditioning for year 6, and as others have said, they most definitely won’t be sitting though the whole video for each and every child. If they’re not interested after 5mins or so they’re not going to watch it through for the sake of it. Same as in the real life auditions, they only focus on a few kids after the first few mins. They know EXACTLY what they’re looking for