Are you refurbishing iBook G4 or PowerG4 laptops (or eMacs) with Mac OS 10.5 (Leopard) or later?
You might want to try the new Stainless browser. I've heard it lets you watch YouTube videos quite
fine on older computer hardware.
I haven't tried it yet. I'm a fan of TenFourFox.
If you can squeeze a few years more use from older computer hardware, you're doing your community
a lot of good. In three years time, technology that was new today will cost 1/2 the price (or less) on the used market.
Phil