1. I don't know.
2. I wait until the spot I want to appear shows up (don't press pause or that play arrow shows up in the middle of the screen) and I press the "Print Screen" button on the keyboard (sometimes it's PrtSc). Then, I open Paint or whatever image editing software I'm using, and paste the contents of the clipboard into that program. (Print screen takes a snapshot of whatever is on your screen and moves it to the clipboard).
2.a. -Then, I use the rectangle select (or crop) function to crop the image. Save it, then you have it.