Blending Options-Gradient Overlay
Gradient's parameters:
Take the next tool 
to represent an indicator of the play time – position. It should have the black color:
Make a copy of the new made layer and apply Free Transform selection to narrow it horizontally and introduce the next parameters:
Blending Options-Gradient Overlay
Gradient's parameters:
The next step includes creating the play indicator:
Blending Options-Gradient Overlay
Gradient's parameters:
Blending Options-Stroke
Take the following tool 
to draw a button of minimizing media player:
Select the last instrument to draw the Stop button.
Finished!
