I suggest you get a 'sort criteria' of video by duration developed because the system (Dropbox) does know the duration of the videos. And I can also get Dropbox to show me only the videos across all folders and subfolders. So, I can see them all including the duration - but I cannot sort by duration. That is poor functionality. I want to list and delete videos of less than, say, five seconds and delete them as I assume they are recorded by mistake.