same as, and considering this post is 2 years old i take it this hasn’t been resolved. I was trying to do this today. If those features are not doable, then why include them, or allow the them to be edited inside the dataset? i.e select field type as a ‘media gallery’, upload gallery images, when this cant be done using the dynamic page/s. seems silly. I’m so glad i didn’t list more than 50 items, edit and upload needed files and such, only to find out they don’t work. i could of wasted hours!. Oh, videos do not work either, just in case anyone reading this is trying to do the same thing.