So I'm having a rather odd problem here. Since earlier today, YouTube videos will load fully, but will not begin to play. See the screenshot below.
The first frame of the video is shown, and, if given enough time, the video will buffer to completion. In addition, the "Pause" icon (which is displayed when a video is playing) is in the bottom left corner. However, clicking on it doesn't do anything except change "Pause" to "Play -- the video will not actually change at all. Neither does skipping to various points in the video -- this will display one frame of the video at that point, but will not play it. I have tried to watch many different videos with the same result.