Hello Oliver,

Please try this css:

.wpb_video_widget.vc_video-aspect-ratio-916 .wpb_video_wrapper {
    padding-top: 222.77%;
}

Thanks.

Hey Again,

Please remove the CSS provided by Judith and use this instead:

.nectar_video_player_self_hosted .wpb_wrapper video, .nectar_video_player_self_hosted__overlay {
    object-fit: contain;
}

Thanks 

Could you remove all Custom CSS so we can take a look.

Thanks

Could you provide the aspect ratio for each video and add an Extra Class to each column that has the video so i can write up custom CSS for it. 

Thanks 

Hey Again,

Add this into the Custom CSS box in your Salient Theme Options panel (We write all Custom CSS in the Live Browser to ensure accuracy. If you cannot see any changes, make sure there is no red cross in the Custom CSS Box as any syntax error would cause all CSS under that line of code to not show up on the Frontend):

#videoregular .wpb_video_widget.vc_video-aspect-ratio-916 .wpb_video_wrapper {
    padding-top: 56.25% !important;
}
#videohoch .wpb_video_widget.vc_video-aspect-ratio-916 .wpb_video_wrapper {
    padding-top: 219.32% !important;
}
#videoquer .wpb_video_widget.vc_video-aspect-ratio-916 .wpb_video_wrapper {
    padding-top: 177.77% !important;
}
#videoquadrat .wpb_video_widget.vc_video-aspect-ratio-916 .wpb_video_wrapper {
    padding-top: 100% !important;
}

Thanks

Hey Again,

Sure, no issues. 

Add this into the Custom CSS box in your Salient Theme Options panel (We write all Custom CSS in the Live Browser to ensure accuracy. If you cannot see any changes, make sure there is no red cross in the Custom CSS Box as any syntax error would cause all CSS under that line of code to not show up on the Frontend):

.wpb_video_widget.vc_video-aspect-ratio-916.hoch .wpb_video_wrapper {
    padding-top: 219.32% !important;
}

Thanks

I am afraid, the autoplay feature is not available when using the embed method.

Thanks

You can try using an Iframe as with that i believe you can set the autopay attributes.

Thanks