Right now, when scrubbing a clip, a live preview is updated every 4-5s roughly. It is better to have a live preview updated every frame just like in macOS quickview. Because right now, the smallest it can be when slowly moving a finger is one second (also no update on live preview). In short, needed more fine scrubbing control with real time preview update (either a pop up or full screen preview is fine).
Forgot to mention what I mean was swipping finger on blank area not on a progress bar (since progress bar already has a scrubbing speed control). Currently, swipping finger across a blank area to forward/backward does not have such a speed control. The best way is to implement acceleration mechanism to control skipping speed just like in macOS quicktime player/quickview.