Screen capture app that captures a window even when minimized? I'm looking for a mac app that captures the screen (video) on specific app window (for example, Safari), and keeps recording what that window sees even when minimized to the dock for example.
Or even if a finder window is over it (without recording that finder window).

Anyone knows an app that can achieve what I'm talking about?
You are making the assumption that windows are always updated when minimized. This is not the case. This also applies to apps present on other spaces. 

In other words, this is not possible.