YouTube Picture-in-Picture
Another YouTube tip that some of you may already know...
If you right click on a video you'll get this context menu...
...but if you move your cursor away from that menu and right click again, you'll get another menu...
...and if you click on the Picture-in-picture option, you'll get a little pop out, resizable, moveable video window that will remain visible and on top of other windows until you close the browser tab for that video, or the pop out player.
NOTE : For small videos like the ones at WGT, you might have to fullscreen them first, so that there is room to display the second right click menu.