Desmosedici Animation Updated!!! Plus, an endoscope on a 4 stroke motor WOW!!

[Langanobob]

What I find very interesting is the inlet flow and velocity at partial valve lift.

Yeah, I was thinking about that too. Appearances can be deceiving but it looked like almost all of the intake charge was finished before the valve was all the way open.  Maybe it was just more visible at high velocity.