If I understand correctly, you want to make a vidcap of the movie rather than edit out an actual movie clip, correct? If that is the case, check out the 'stickies' at the the top to the "Site feedback and Support forum". For example, the following like contains several ways to make vid caps:
https://forum.oneclickchicks.com/showthread.php?t=12137
The absolute easiest way, though probably would be to hit "Prt Scr" on your keyboard when the movie scene that you want to cap is playing and then paste it into an image viewer and save it as a .jpeg file.
Hope that helps.