I just watched that YT video and what a refreshing explanation of prostate surgery and the after effects.
I think the point about loss of erections, even in couples where penetrative sex is but a distant memory, was very well made. My favorite quote was 'if you woke up from your surgery and they said 'hey, we have to take off your arm, but it's OK because you don't play tennis anymore' then you would be quite distressed'.
I was surprised that they didn't mention that a very pleasurable orgasm can still be obtained without an erection however as (for me anyway) it was the orgasm that was enjoyable, not the actual erection.