Weird new noise that popped up ( no it's not the taco tick)

Anyone know what this sound could be? You have to listen carefully sounds almost like a knock but can only hear it in the cab and not when I'm looking in the engine bay goes away after the truck is warm. Can't find anything on tacoma world about it so if anyone has a link to something that sounds similar would be greatly appreciated.

Video
https://youtu.be/Puv7x39yx78?si=XeZBN5tYXUXo6oIq

 

Automatic or Manual transmission?
Have you listened under the truck.

 

Manual transmission

I plan on looking under it tonight after the engine is cold again goes away once it's warm

 

If you rev it up does it go away?

 

Ya i don't hear it when giving it gas just at idle when the engine is cold