If the noise pops up just before your vehicle comes to a complete stop (as it did in your video), as opposed tosquealing throughout the entire range of braking, the cause could be a brake pad that is vibrating against the rotor. A set of brake pad vibration damper pads /shims / lubrication could cure the squeal, but there's no guarantee. Also some brake assemblies have a wire spring on each pad that tries to pull the pad away from the rotor when the brakes are not used. These springs can be missing or not attached correctly due to recent work done on the car or some other mishap. If the springs / shims are wrong, your pads could have been rubbing slightly on the rotor and perhaps have become glazed. Glazing on the pads can cause the squeal and vibration when applied. Glad you got an appointment and will be getting them looked into by your SC.
Another cause of squeal is a wear indicator that is inbeded in the break pad itself. As the pad wears out it reveals a metal tab which emits a very loud squeal as it rubs against the rotating rotor. I do not think this is the case in your instance as the squeal was more towards the end of the stop.
Also, if you get new break pads as a part of the fix, do some research on breaking in new pads. There is a procedure to mate the pads to the rotors which is easy and somewhat fun.
