I have probably posted these before, but anyway here are the resolutions of popular consumer video formats:
(horizontal lines)
VHS / VHS-C = 240
Video8 = 250
Video8XR = 280
SVHS / SVHS-C = 400
Hi-8 = 400
Hi-8XR = 440
DV / Digital8 = 500
These may of course vary, but these values are considered standard.
