1: I choose the solution or starting the gps software at the launch (the gps window is hidden).

2 : switching from your video screen to gps screen is relative to your skin. but with Enicar changing the screen when a video is playing will not stop the video, another modification from RR.

3: Fast Foward, Fast Backward, next video previous video is already handle by the button. It was one of my first modification in regard of RR.
In general long pressure on forward is fast forward. Single pressure is next.
Available for video & audio.