Quicktime and Windows 98 SE

I have Win98SE for an operating system, and Quicktime installed. But still, I can't view most of the videos. I've tried with Opera, Mozilla and IE. With IE I was able to view one video, but after that, no other videos worked.

It could be that I'm doing something wrong at my end, just telling it like I exeperience it at the moment.

uncurieux