VLC works- QT doesn't

Question

I've seen a few similar questions here, but none with answers. Thought I'd throw mine into the mix!
I have re-purposed my old 20"iMAc G5 for my kids movies. I have a bunch of our DVDs I ripped using Handbrake. The pre-sets used were for the AppleTV, as that's what we typically use to view movies (streaming into our TV room). In full-screen mode, the movies skip, stutter and hang when playing back either in straight QT or using the iTunes interface.
I was chalking it up to iMac not being able to handle the bit-rate (which I tend to jack up a bit from the pre-set). But before going back and re-ripping (ugh!) I decided to give VLC a try, and whatta ya know-- they all play with no problem!
Seems odd to me QT can't handle but VLC can— anyone know why that is?

Answer 1

You missed something.
I do have VLC installed on my Mac mini.
I bought QuickTime 7 Pro after my VLC installed.
Why did I buy QuickTime 7 Pro since VLC has been doing good anyway?
Because QuickTime is good at making .mov files using international industry standard H.264 with sound track AAC (better than MP3).
I was confused too, but now I know, a good player is not how many format of videos it can play, it's how good it is supposed to be at.
VLC can play almost everything, but play a video is nothing, many software can do that.
Many people installed some third party plug-in to QuickTime player, make it like VLC or windows media player, such as perian.
But I don't do that.
QuickTime Pro is good enough to play lots of videos, it's the core stuff of FrontRow too,
Because Apple wants us to use .mov as possible as we can. We are fan of Apple right?
MPEG 2 or WMV or AVI are the past tech. H.264 is the future, it's better than DivX or XviD.
That's how I think.