Hi, excellent work!
For the screenshot preview I think it's better if you drag it to e.g. a file upload form inside the browser (I heavily use that on Phabricator's comments text field). Just dragging it to the browser which will then display the image doesn't do the usefulness of this feature justice imho. For the icon widget showing just the properties dialog (especially the, for this usecase, useless Permissions tab) isn't what this is mostly about. Well, yes, but the dialog is pretty common for files and somewhat abused for this usecase. Perhaps you could show an icon widget on the desktop, right-click it, click "Properties" and then in the dialog change the icon and name and click OK so we can see what it's all about. Two minor nitpicks: * In the grouping plasmoid the "Home > Pl...allpapers" doesn't look very pretty (FolderView can be configured to show a custom title, maybe just set it to "Wallpapers" manually for the video) * At 0:34 one could tell that you almost forgot to check the "use desktop layout" box ;) Cheers, Kai Uwe