right, video creation inside Plant Simulation can only be done for 3D windows.
If you want to create a video from a 2D simulation you can use free tools like Windows Movie Maker or commercial ones like Camtasia.
Video recording from within Plant Simulation is a pure 3D feature.
You could either use an external video recording tool for what you try to accomplish or you could activate 3D and then record the whole application (there is the setting "Record Client area only" in the video settings dialog - if that box is unchecked, the whole application window is recorded).
Note that the video recording function is only available if the active view is a 3D view so you have to record at least something that also contains a 3D view. I can't say whether that is something you would want.
the frame has two methods which you can use for this purpose: