Add UI to allow user to continue their last played video
Currently the app can remember the time the video was played - e.g. 1 minutes into the video.
However, it doesn't seem like we can quickly continue the last played video - if the OS or the user force closed the app. This issue becomes more obvious once we have a long list of files to play and the file we want to continue is down at the bottom of the list - a long scrolling will be required before we can find the right file and play it again.