My car was making an odd noise on a cycle. I lifted the hood and found the cause.

I think it's the AC rotor , but unsure.
If someone could identify it for me, let me know how much damage it could cause in its state(short term/ long term) and how hard or easy it is to replace.
Thanks,
D

 

I've a vid but its mp4 format. Will try to convert to 3 if anyone thinks it'll help.