It could be illegal.. i admit this video looks illegal on first glance (as opposed to the other one).. but it could be a combination of a floppy strange looking delivery and the fact that it is being filmed off center side as opposed to the exact behind the plate view.
When I enlarge this one.. again its no so clear that the blue you are trying to roast blew the calls despite all the complaining that was doubtlessly occuring during a consistent illegal delivery at this level of ball.
It would be nice to be able to see the plate in this one.. but like the guy who can call a strike from a football field away, we dont really need all the evidence to decide anything.