In the radar literature, particularly in older references, the term "video signal", "downrange video", or just "video" is used to describe the radar signal at a certain point in the processing chain. Also, I have come across the related term "video frequencies".
In older radars with analog processing, I interpret the "video signal" to mean the voltage as a function of time at the output of an envelope detector after downconversion from the carrier frequency.
In modern radars, particularly coherent pulse-Doppler systems, the term "video signal" seems to be equivalent to the general signal processing term "complex baseband signal" or "complex envelope", in that it contains an in-phase and quadrature component. Although sometimes I see plots of the "video signal" where the magnitude of the baseband signal is plotted versus time, which seems roughly equivalent to the envelope-detected signal of an analog radar.
I interpret the phrase "video frequencies" to simply mean the signal has been downconverted to be centered at 0 Hz.
Are these interpretations of the term "video" correct, and is there any other nuance I should be aware of?