kugelmeier Is this also possible on "Home" site (Module)? There starts the video in the large picture.
For the respective video to appear proportionally right in responsive mode, You may change this :
@media (max-width: 992px) {#Mod118 iframe,video,.productdetails-tabs iframe{width: 100% !important;}.productdetails-tabs iframe{height:100% !important;}}
to
@media (max-width: 992px) {#Mod118 iframe,video,.productdetails-tabs iframe{width: 100% !important;}.productdetails-tabs iframe,#Mod118 iframe{height:100% !important;}}
Also, For reference, You can check out this tutorial
width: 100% and height: 100% make the iframe take all of the wrapper’s space.