Wildcat, you got them all right!!
Graeme, yes you can but it takes alittle work. In fact almost all those images came from YouTube. This is how I do it:
While viewing something on your monitor, when an image or pic that you want is on, press the "Print Screen" button at the top of your keyboard - mine is at the end of the "F" keys. This places a pic of what is on the screen to a clipboard.
I then open a graphics program (I use "Paint" that comes with my PC and I think most PCs) and select "New" for a blank page.
Then I select "Paste" from the edit and the whole screen shot is pasted onto the blank page.
I then cut/crop what I want, select a "new" blank page and paste.
The "Paint" program usually only saves in Bitmap, which can be huge, so I then go to another graphics program (I use Ifranview) and save as a .jpg or clean it up - whatever. and waabamm!! I have a screen shot.
Its not so bad when you get the hang of it.
Now I got to find more movies. I think if your PC also plays movies you can do the same thing without going to YouTube.
ok, some more.