From the drop-down menu located on the left of the screen, you can access the different submenus of the app. For example, in the settings options, you can choose the download directory where you want to store the videos or the number of pages you want to browse through. From the file manager, on the other hand, you can easily play all the videos that are stored in your smartphone's memory.
TSPMD - The Simple Pocket Media Downloader is a very useful app that lets you download all kinds of videos in a matter of seconds. You can watch them again and again, even if you don't have an internet connection.