Engine buzz after service

[JPB]

I just had an inspection 2 service done on my 3.0i before Christmas and now I've noticed my engine is buzzing. I had all new oil filters and spark plugs, usual stuff.
You can hear it in this video here: https://drive.google.com/folderview?id=1zKt6syrPDbKyDbbw7VRN2XvvfAAic7Hb
Any ideas? Should I be worried?

It drives fine, and feels a bit nicer and smoother than before, but the buzzing is odd and wasn't there before (I don't think!)

 

[firebobby]

I Can't get the video to play
It could be where a cover was removed and has not been fitted correctly. Can you pin down where the noise is coming from.

 

[JPB]

Ah good shout, I'll check it out tomorrow. Sounds like it's coming from around the engine area.