#galerie-videos .VideoGallery_1_Frame_CssClass{width:100%;}

#galerie-videos .VideoGallery_1_Item_CssClass{float: left;
    width: 25%;
    padding: 15px;
margin-bottom:4vh;}

 #galerie-videos .VideoGallery_1_Item_CssClass iframe{width:100%;}

@media screen and (max-width:1220px) {
#galerie-videos .VideoGallery_1_Item_CssClass {
float: left;
    width: 50% !important;
    padding: 15px;
margin-bottom:4vh;
}

}

@media screen and (max-width:500px) {
#galerie-videos .VideoGallery_1_Item_CssClass {
float: left;
    width: 100% !important;
    padding: 15px;
margin-bottom:4vh;
}
}