The scrolling is awful, it fades out the trailer roll if I stop moving my scroll wheel. Looks like it's not resetting the 'hide trailer roll' timeout when scroll events happen.
If you're scrolling, it stays open. If you pause the video, it stays open.
If you stop moving your mouse, we wait a couple seconds then fade out. If you move your mouse, it resets the timeout.
Some people would scroll a little then stop moving the mouse to watch the current trailer and were expecting details to fade away since they were no longer interacting with it.
I think I understand your point, but it's tough when some people expect A and some people expect B.
Note that scrolling once and waiting causes the roll to stay up for a short while before fading out. Scrolling a lot and waiting causes the roll to almost-instantly disappear, when I expect the same delay as the first case I described.