IMac G3 no video playback

hey all
i have a old iMac G3 500 MHz PowerPC with 1GB Ram running Tiger 10.4.11 and it wont play video correctly, its just pauses and then jumps around a bit, the audio works fine, i have tried
youtube
.mov
.m4v
.avi
all have same effect
VLC comes up saying something about frame rate dropping
anyone got ideas? i know its old but come on it must be able to do video?

how about video files on the computer...
Some of the same stuff is afoot. Depends on the source of the video and the codecs used. I have some QT videos on an old G3/500 Minitower that are contemporary with the computer. They were shot and post-processed on older Mac hardware and doftware and work great. However, if I download something newer that was shot and post-processed on newer equipment and software, the G3 chokes.
BTW, that old G3/500 has any G3 iMac beat on video hardware--a 128MB VRAM PCI video card optimized for OSX that is the hottest card that model takes--and modern video is still a drag.

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