Thats gotta be bottom end. Notice in you video that the noise is louder for the first second after starting the engine? Its because there is on oil pressure. Noises like that can travel through an engine sounding like something else and miss leading you. Pull the oil pan and rotate the crank. I think your gonna find a spun bearing on a connecting rod.
It doesnt mean all is lost but you'll probably have to replace the rod and have the crank turned or even get a replacement. None of this work is that difficult but you'll have to pull the engine.