About a man spending years underground mistakenly thinking a nuclear war had taken place. But NOT “Blast From The Past”. A clip from this other movie was recently one of YouTube’s shorts but with no identifying information. The clip shows a bearded bedraggled man confronting people who cut into his underground shelter and informing him there was no war.
If you can find the short anain and screencap it, maybe Google Lens can identify it.
Okay, luckily I for once opened the short so I have an actual link: https://www.youtube.com/shorts/W62ak4aWras
I’d say My Home Movies, but they are accounted for.
And I shave. Itches too much.
It’s a scene from the beginning of Loudermilk S2E5 – “I Fought The Law”
Thank you! Any fuller description of the episode’s events anywhere?
Maybe on the internet? 
Other than that, it seems to be streaming on Prime.