I just watched the video. Odd noise. My first guess is that you are out of power steering fluid, or have the wrong type and the pump is cavitating.
My scary noises have been rattling heat-shield on the exhaust and a failed clutch on the AC compressor. The AC compressor made a cloud of foul smelling smoke when the clutch seized.
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I am not an attorney, mechanic, or member of the clergy. Following any advice given in my posts is done at your own peril.
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