In this page
here read for instance the "Sega Genesis 1 / Mega Drive 1 / Master System" session.
It reports
and a 10uF – 220uF / 10v (min) – 16v capacitor
470 ohm, 1/4 watt resistor
I do not see any valid reasoning for this. Video signals are 0.7vpp, and such consoles all work at 5V, it would seems to me 6.3V is already being "way too safe" for the caps.
Same story for the csync line resistor. 5^2/470 is the max power, so a 1/16W resistor still seems a conservative choice.
Are there some other reasons for which my reasonings are wrong?