Best video format for a retired PowerPC (iBook G4)? We have a retired iBook G4, it plays H.264 quite laggy.

My question is what is the best video format optimizing for Battery Life on a PowerPC?



Bonus question: Is there a free batch converter for macOS to process 300+ file?



Is there a forum somewhere better suited for this kind of question?
MPEG4 encoded with Handbrake, or use Xvid with ffmpegX.

MacRumors PowerPC forum is definitely a better place to discuss this.