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Post the clip or a link to it on youtube and I need a description of when it occurs and any recent work done to it.
That is fine I have to step out for a few hours and will be back until tonight anyway.
Do you have the vehicle identification number available? It sounds definitely louder under the hood it is an unusual noise can you isolate it? Does it sound like it is coming more from the passenger side of the engine or from the driver side of the engine near the fender area?
There is a circulation pump that is supposed to kick on to exchange the coolant in the water tank under the left inner fender. When you turn the engine off after it's been fully warmed up to operating temperature can you hear the buzzing right after you shut it off or does that pump noise sound normal.
Record another video out under the hood moving it from down by the transaxle behind the inverter and then over slightly towards the drivers fender area? Does the noise pretty much there the whole time when it is sitting and running or if the engine shuts off and the READY light is still on does the noise go away?