if the issue as i understood is to fit the screen try to set “100%” in both instead the fixed standard values: <iframe width=“100%” height=“100%” and then you are free to scale as you want in both versions 
it works!
if the issue as i understood is to fit the screen try to set “100%” in both instead the fixed standard values: <iframe width=“100%” height=“100%” and then you are free to scale as you want in both versions
it works!