Hello nK,
Somewhat belatedly as I have been busy elsewhere: thank you for responding in this forum despite the support ticket system. I am happy for your reply here as it comes to the benefit of others, too.
It seems to me there is no difference if content in still image or video: in either case it is not possible to short cut to the Full screen button. Thanks for the link to the example: that is the function I have currently applied on my site.
However, for a gallery experience I think it would be great to be able to go full screen directly so as to remove clutter from the viewing experience. If this is at all technically feasible, perhaps an option to consider?
Many thanks,
Thomas