Slide 28 is not correct - a VCO changes its frequency of oscillation in response to a change in applied voltage . the VCO was a crude way of making a stable oscillator required to generate the video output frequency.
I suggest you do some research before you commit yourself to print in the future.
Capacitors of this value and rating
25 volt 1000uF (microfarad)
50 volt 470uF
16 volt 2200uF
are EXACTLY the same size today as the effective rating and capacitance is a direct function of the area of the plates.
DO YOUR RESEARCH
I agree - but you will also be aware that switched mode power supplies have changed the world. How big would a desktop or notebook PC be if we still used standard AC frequency regulated designs? (Double Huge).
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From memory the chip you couldn't identify in photo 27 is the 8565 video chip