Video Tutorials all jumpy

[Figory]

Hi

I'm trying to watch video tutorials on the web of (rapidweaver) and I can't because they don't run smoothly and the audio is all fragmented.
Any clues as to what I need to change?
Thank you

 

[HLdan]

Please post links to the videos so we can check them out for you. Also please post specs of your Mac.

 

[Figory]

thanks o.k i've got a mac powerbook G4 version 10.4.11
Memory 512 MB DDR SDRAM
Capacity 55.88GB
Available 4.06 GB

I want to learn rapidweaver on
http://www.rapidweaverclassroom.com/

THANKS!

(The sample there.... before buying it)