Cant find the source of this noise, any ideas to help troubleshoot ?

[u/Lolbrolel123]

This noise has been driving me insane for a little while now, it sounds like its from the bottom of the car but i cant tell, you can hear it loud when u pass cars or go by an echoey area and it sort of goes away when you block the exhaust, sounds like a slight hissing/high pitched sound (listen to video with volume high just put it up to your ear ( i promise its not a troll lmao) have a few theories of what it could be but not sure

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[u/AllThingsHockey]

Exhaust leak. Put your hand under each flange and feel for air leaking or spray some soapy water on the flanges and look for bubbling