HoverDerby has been suffering from a problem where the webpage displayed on several media surfaces was distorted in width and height for some users. Each user might see the scaling differently, even.
My scene settings had the width and height both as 2048. I found by experimentation that passing in this value explicitly with the .OverrideMediaUrl() method variants fixes this problem. I conclude that it is not correctly using the previously set width and height values for the media surface. It should carry the previous value forward if the call to .OverrideMediaUrl() does not explicitly include new values.