Printscreen doesn't work always anymore as most current players use a new Direct-X mode (VMR-9) where the video appears as a black area if you try to printscreen it.
For videos I'd also recommend to use BSPlayer
http://www.bsplayer.org/. With BSPlayer you can set up a directory and a naming pattern for your video caps and just press 'P' (or whatever you want to configure it to) to get as many snapshots you want as either jpg or png files in this directory. Besides that it's a nice little skinnable player that loads pretty fast and is a good choice for a default video player on Windows. It can also play wmv files and unlike the MS player it does so without opening any embedded spam website links.
Another alternative for screen captures is SnagIt
http://www.techsmith.com/ if you want to make screenshots from more obscure players or any other program you like. SnagIt is also great to record entire webcam sessions and even works well with yahoo messanger which terminates itself if you would press the printscreen key.
* This post has been modified
: 20 years ago