UI Weirdness in "New From Template" -> "Video"

Not Sure if this is a bug or if i dont understand the intended use:

When using the "New from Template" command, there is an option to choose common video Formats (which is great). When opening the dropdown "Video Size" Selection, there is Custom and the standard sizes (1920x1080, UHD etc.pp). When selecting i.e. 1920x1080 (HDTV) there are two input values which seem to offer the option to change the selected preset sizes (which would be good). In fact these input fields do nothing though. If you type 8000 in the width field, it will still create a 1920x1080 document.