Engine noise unsure where from

Technical Area Engine, Transmission, Exhaust etc
1
  1. My model of MX-5 is: mk3.75
  2. I’m based near: Manchester
  3. I’m looking for technical help or recommendations on: engine noise
    Hi pretty sure this isn’t a normal noise from the engine originally I thought it might be coming from the belt tensioner but it doesnt sound like it’s coming from there. Does anyone have any idea what it could be. Link to video via icluod. iCloud Photos - Apple iCloud