Non players do understand the all-in coups though
If what you mean by "understand the all-in coups" is "see when someone knocks someone else out" then you get that at the end anyway - just tune in for the last quarter of the show if that's what floats your boat.
With someone talking you through the hands, it's not too hard to go from understanding "that dude's out because he ended up with a pair while his opponent ended up with a flush" to, "That dude has more chips now because at showdown he had a better hand," or even, "that dude has more chips now because he bluffed and made the other one lay his hand down."
It's not rocket science.
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