Somehow this would divide by 0 on the next line, not crashing but resulting in an integer overflow on `overlayHeight`, which would crash when trying to render.
Added optional padding to video frames because that's what VideoPlayerWidget expects.
Keeping the option to not use padding for other use-cases like converting frames to PNG.
Removed property backing fields where applicable, introduced C#7 syntax for properties.
Renamed a bunch of interface properties and class private members with more descriptive names.
Did some inconsequential reordering.
