Screenshot a frame in a Youtube video?
Sometimes I want to take a screenshot of a certain frame in a Youtube video, so I was looking for a way to take a screenshot of just one frame in the video, not the window, and not a selection, just the frame in its exact size. I was playing around with the key combinations for screen capturing and suddenly I managed to capture just one frame, and it was automatically saved to the desktop as a png file. The sad thing is that I can't remember which exact keys I pressed, and I haven't managed to do it again. I remember that I saw the little camera icon (from Grab utility I guess), and that I clicked the video frame in the Youtube player, and the screenshot was saved to the desktop. I have tried several key combinations since then, but all I have managed to do is either capture the whole browser window or bring up the portion selector. Please anyone, what key combination is it I'm looking for?
iPhone 5s, iOS 7.0.4