Rattling sound from engine bay (video included)

[Luke Alexander]

I'm going to try to add as much detail as I can here in the hope of a response.
My Fiesta Mk 6 engine is rattling or something, it almost sounds like a hole in the exhaust, but will disappear at high revs or when the car exceeds 30 mph.
I was under the car today looking at the heat shield and for a 12 year old car it really is in good condition.
Everything 'appears' to be as it should.
However after looking online I'm in the dilemma of 'everyone has a similar issue and blames different part'
I'd like a solid answer if possible please or at least be able to narrow it down to a few things.
Here is the video link for you to look at and gives a pretty good example of the noise when applying any form of acceleration.
If you need any more information please let me know.
Thank you
Here is the link: https://youtu.be/w8bLaQ8nRIQ
 

[st line x 140 driver]

Hi luke need to do better video.