My 2010 Rav4 has been making a somewhat similar sound lately and I did a front and rear brake job recently too. On mine the noise only occurs when the vehicle has set parked for some time on an uneven grade. When it sits level like in my garage the issue never arises. But it does go away after driving for a short distance plus the sound is more like a moaning than a grinding like in your video. I did replace the front and rear swing arm bushings just for the heck of it but the issue remains. Aggravating for sure.