1. Go to the video you want and pause it at the time you want. Press the Print Screen button. (It is to the right of the F12 button.) Go to paint and press edit, then paste.
2. Click this button

3. Click on the area and drag it into the top left corner.

4. In the bottom right corner there is a little blue dot.

5. Use the blue dots to line the edge of the picture with the edge of your screen shot.

Save the picture, and your done!

(If anyone would like to add something, let me know!)