QuickTime Alternative is a trimmed-down version of QuickTime that contains only the essential components needed for playing QuickTime content that is embedded in webpages.

Advantages of QuickTime Alternative are:
Quick and easy install
Ability to make an unattended installation
No background processes
No unwanted stuff and other nonsense
Smaller size than Apple QuickTime

It comes bundled with Media Player Classic - a freeware media player that supports both QuickTime Alternative and Real Alternative.