About where we began to get Pentium 3's at 500+ MHz and over 128MG RAM we found we could play DVDs and video. Your post complains that such takes CPU and RAM. That's proper. If you want something that doesn't then you'll want to use devices that are standalone.
Hope this helps you understand that playing media takes CPU power and RAM.
I need something. A Media Player that doesn't eat resources for video and audio... Doesn't eat memory much. But full of features. I tried GOM or GNOME Player, Qessetial, Zoom Player and VLAN Player. And still not yet satisfied. Even Winamp and iTunes didn't satisfy me espeically Windows Media Player Classic.
Can you suggest any?