Hyundai Sonata making a noise when braking

I have a 2010 Hyundai Sonata with 88,400 miles and I am hearing a knocking noise in my rear right wheel whenever I apply light to medium pressure to my brakes (I don’t hear anything when I brake hard). It started a year ago and I heard it throughout the summer. But in the winter, I didn’t hear anything. Now that it’s getting warmer again, the noise is starting to come back. I’ve taken it to my mechanic numerous times and he doesn’t know what it is. I had my brake pads and rotors replaced just before the noise started a year ago. Here is a video of what the noise sounds like (this isn’t me, but the same scenario):

rear brakes should fix the problem

@kndonatelli88 take your car to a different mechanic, for starters

I can’t swear to it, but I believe I briefly saw a Saturn emblem on the steering wheel in that video.

So, that’s not your car

And, it’s not even the same brand

We’re really going to have a hard time diagnosing your noises from cyberspace

Maybe somebody has a crystal ball

I don’t