Maybe I don't understand what you want to do, but for at least 3 years I've been able to load a video clip in, set up the settings, add to queue, load video, add to queue, repeat. Then process the whole queue overnight.
It can batch convert a whole Folder without having to add individual files and always has been. One of the worst ui choices for it though, there is a well hidden menu item called add all. Took me forever to find it