Doesn't CCT go away when you rev and come back on deceleration? Hard to tel on vid but mine sounded similar but louder when I had parts of my gearbox rattling around in there :-S
do you mean when engine warms up the noise goes away i have the same noise but only from cold when the choke kicks in once the chock goes off the noise goes away
Dito................mine sounds exactly the same until 60 deg. It's worse if I use fully syn oil so I now use semi which made a hell of a difference. I have recently stripped the engine and found sweet f all wrong with it.