Apple provided Microsoft with their operating system code so that MS could make Word and Excel. It was this preview that MS used to try and copy the Mac. Microsoft lost a law-suit for lifting the code from Quicktime and putting it into their Windows media viewer...
And now you can go get FREE Quicktime Alternative and it runs on windows. Uses less memory, no annoying popups or starting up to update (unless you want it to).
Includes RealPlayer Alternative.
Free, small, and lite on memory usage.