Can't make embed collection from my own uploaded models

So I have made collection from my uploaded models, but I can’t somehow embed them all as collection, says that collection is empty even tho they are there, want single iframe embed code for all that I can browse them from custom touchscreen HTML5 project, I can do this from models that are on site and when I add them to another collection. I know I can do this if I separately embed them to my project, but that is so much work and many pages.