New brakes, squeak sound at front brakes

[Vesper]

Hi guys, 1st post ever on Yarisworld, such a bible in here, amazing !

Still writing for a squeak sound my girlfriend's getting with her front brakes (new rotors & pads, 500km on them) on a 2008 Yaris.

https://youtu.be/BF5zBAvQPTU

The video tape was took from the outside near the driver side wheel almost at stop position. Sound at 6 and 8 sec is the brake paddle itself.

You hear it only when releasing very gently the brake pedal from a stop position or when making a complete stop with pedal to the floor, normal brake application doesn't really make the sound, but still annoying and I'd like to find where it's coming from.

Rear drums were cleaned and greased also, they were making their own squeak sound, but cleaning and greasing them solved the problem.

I did the brake job myself, dissembled the whole thing a 2nd time and still getting the same sound...any idea ?

Thank you !