Bozar
When I go to take a screenshot of the player, I get a black screen, however the subtitles still show up. I have tried multiple methods of screenshotting including sharex, the print screen button, and the windows snipping too, and all of them have had the same results. I'm using the browser site in Chrome. I saw that someone else was having the same issue on the forums, but my friend was able to screencap on their computer just fine.
This probably depends on what GPU and renderer (can be set in graphics settings) you use. As Jupstar said, F10 should always work, even if the other methods fail.