01 STS Sound from Engine

Just to let everyone know, I have an earlier thread but would like some more input and now have a video with noise when engine is at running temp. It is more noticeable from the drivers side wheel well. I have also checked the water pump pulley and does not seem to be loose. The trans has recently been rebuilt also.

Please take a listen if you have a chance and give me your input on a possible causes.

I appreciate everyone time and all expert advise.