One that annoys me a lot is the video controls overlay auto hide timer. I'm never sure if the app hasn't one, or if I'm about to hit back at the wrong time and

One that annoys me a lot is the video controls overlay auto hide timer. I'm never sure if the app hasn't one, or if I'm about to hit back at the wrong time and stop the video when I just try to hide the overlay. If you put a timer, always add a visual indicator too (reverse progress bar in a corner for example).