The best replacement for s-video is component.

The best alternatives to s-video are rated as following:
★★★★★  component
★★★★★  composite
★★★★  vga
★★★  rca
★★★  hdmi
★★  component video
★★  dvi
★★  rgb
★  scart
★  composite video
★  coaxial
  av
  component cables
  cvbs
  bnc
  vga resolution
  coax
  vga quality
  ypbpr
  component quality
  component cable
  composite cable
  svga
  av cable

Your alternative for s-video is not listed? Suggest!
Speaking about s-video, one probably shouldn't forget about audio.

Other search terms related to s-video and their ratings are:
★★★★★ audio
★★★★ sound
★★★ rca
3 rca
You have in mind a companion for s-video and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of s-video in all years. Click on graph for more.
s-video
component
composite