Make another vid with as many examples as you can including some from a birds eye view with the lid off. Try and duplicate the problem in as many ways as possible. Someone might be able to spot something.
How long can you go WOT? Does it die when you let go of throttle? You mentioned that the idle drops very low when letting go of throttle after WOT. That is probably a rich high speed setting thats flooding the engine and it needs to burn off the excess to be able to idle properly. Either that or idle is set to low.
Keep us posted.