4K stock videos are available in the PosterMyWall editor. Click 'Media' on the left bar in the editor, and select 'Add stock video'.
In the stock video tab, go to 'All Sizes' beside the search space and select '4K'.
Only 4K videos will be displayed now. 4K videos are easy to spot as they are labeled.
Select a video and it will be added in the editor.
