I have been searching for several days now and run into your plug-in. I gotta say for ease of use, and quality it is the best one out there. I am ready to go pro, but here is my problem. I downloaded the FREE version made a video slider used the short code and placed it on my site. It looked great, but then when I looked at the site on my iPhone 5 it had not sized the slider down it was “huge" compared to the other images and threw everything off to one side in the iPhone browser. Is this something your technical folks have experienced and know about. Maybe they are working on an update.
I’m just frustrated cause I want this to be my solution and having it up and running yesterday.
I don't know which plugin you are using: WonderPlugin Gallery https://www.wonderplugin.com/wordpress-gallery/ or WonderPlugin Slider https://www.wonderplugin.com/wordpress-slider/. But here is the solution for both plugins:
In the Gallery/Slider editor, step 3, Options tab, there is an option Support responsive web design, please check it.