good that the time is show in GUI.its also usefull to have time in the window title.
what i think good when there are 2 sliders to navigate.
1. slider do minutes step, and the second slider do seconds step.
so you can navigate in large videos very precise and maybe later its possible to use ffplay as a video cutter too, so you can mark blocks that are skip during play and do playlist or later can reencode