Can't play movies on iBook G4

hi,

right have late 2004 ibook g4 1.2 ghz processor, 768 ram.
have leopard installed (10.5.8) , made sure have software date.

youtube choppy watchable @ 360p, 480p no go.
however, want play dvdrip 700mb movie vlc , it's unwatchable, sound stuttering.
given ibook, maybe video card dead.. wouldn't know.

streaming news sites ok, pretty fine, can sync 4s thing.
ram issue ? know can upgrade 1.25gb first want make sure else ok.

thoughts ?

 

you have lot's of threads here youtube,videoplaying , tips on faq on sig, why don't give read?

 

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