Nope, haven't lived there for the majority of my adult life. I still pay taxes to my home country because I decided to keep my original citizenship. I'm UK based these days.
I'm not telling you I know the specifics of what's going on over there. I AM saying I've been confronted with similar situations as I saw in the clips you posted, both in my personal life and in my current capacity as a helper. The US isn't the only place where you find squalor like that, although I dare say your country is pushing the limit in the so-called 'civilised' world.
... But, to be perfectly frank and graphic, an average day for me awhile back commenced with me waking up on a piss-stained old mattress, having to step over variously intoxicated and often mindlessly hostile strangers on the way out, keeping my scant belongings on me in a rucksack at all times because I knew they'd be gone as soon as I turned my back otherwise.
Downstairs (one floor below my 'room' where I shared said filthy mattress with two others) had the corners piled in literal shit because anyone who wandered in from the streets just used it as a fucking toilet. Everything stank and there was no privacy. I was subjected to attempts at physical and sexual assault as a matter of regularity. Some people were dropping of overdoses and nobody gave a shit. I spent an entire day with a corpse because there was an argument about how, when and where to best get it out of the building without the cops getting involved. ... But sure I have NO IDEA.