the noise you i heard in the video is straight forward brake pad noise. if it were the points you showed in the pic, you would hear a rotating sound all the time and it would increase when you are accelerating.
you probably shifted something when taking the brakes apart and made the squeak go away. usually lube and chamfer will fix the squeak issue or replacement of the pads when the brake sensor is making the noise.
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2011 E92 M3 6MT
Gone - 2007 E90 335i
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