"SBS" and "2D" are not compatible. If you have a video that's SBS, it should be 3D, otherwise why make it SBS?
Size and Height are not specified in the file name. The file name only indicates the StereoMode and ScreenType, like the document says:
If you want to specify the Size and Height, you can create the right json file and let DeoVR open it, like the document says.