Hi!
Let's see if I can help out in any way. A few things come to mind:
- rotor or rotors touching the metal brake dust shield either in the front or back..could be a bent dust shield, just need to bend it away from the rotor and you'll be okay. I've had this before but it was due to me hitting the dust shield causing it to be too close to the brake rotor...I noticed that when you were turning left it was most obvious then a little when you were driving straight and then it didn't do it again after the speed bump..its possible that a wheel bearing is also slowly on it's way out because on turns that's when bearings show their looseness especially when a dust shield is really close but start with the dust shield and check the wheel bearings...what you can do is see how close the dust shield is visually and with your hand but be careful those brakes get real hot real fast...and see if you can gently push away the dust shield from all the rotors...I usually push at the top of the shield and very bottom...it doesn't need a lot of push either..and retry exactly what you did in the video..if it goes away, problem solved
- loose metal heat shield on the exhaust system..there's more vibrations when the car first starts moving especially on turns when there's more tension on the powertrain so it could be that...try placing the car in neutral and slowly increasing the rpms on the engine...you can do slow increases, then faster increases but on the lower rpm range, no need to go high...
- Other than that, I can't think of anything else, but then again in person is always easier to diagnose. Let's start with the two points above and we can take it from there
