More videos when revving the engine. I listened to your videos and I think mine has a faint whistling noise but the original one before replacement had the same noise if not a bit louder- there was no cause of worry or alarm. Yours is very pronounced even when idling - I can not hear any whistling noise when mine is idling. I suspect whines when revving are normal pulley noises as my e39 does the same. Yours being much more pronounced, are your sure your pulleys are ok?
https://streamable.com/556s6
one more video uploading .....