V60 D5 2013 61k.Vacuum leak? Please advise!
 

V60 d5 2013 with 61k miles.
Just noticed this noise today, definitely developed in the last week. Goes away after applying brakes.
Video: [YOUTUBE] https://youtu.be/9Fy7QddHbrE[/YOUTUBE]

So far the advice i got was to change the vacuum pump VALVE apparently its a common culprit. EGR cooler vacuum line also been mentioned. Any other suggestions or advice please? Where do I start?
Thanks a lot.