Display of vertical videos - Preview image, max-height

Hi,

the documentation is not totally clear about this, but the stretching-mode "responsive" only applies so regular landscape videos?

Sadly I have to integrate some vertical videos and the player stretches the preview image to a width that would correspond to the video-height if that video was landscape. The video responsiveness does work for vertical videos, but the documentation is not clear on how I would limit the max-height. I can either set height:100% or set height to a fixed number (thus disabling responsive stretching). How do I achieve something like height:75% - or even better: max-height: 80vh?

Cheers and thanks for the great work!