I can see this as a one time verification to help verify the video isn't being faked / you aren't working out of a remote cube farm in another country.

Clearwater firm KnowBe4 accidentally hires North Korean hacker

...cluttered? the fuck?

has this fucker seen a cubicle? why did she allow it?

If they want to see my green screen colored walls, it's up to them. I think the background looks better when it's dark abstract art, less distracting than bright green.

A large percentage of people in Human Resources are absolute idiots. They often use their own perspective as what the company should be doing.

Ask them politely where that rule is because you want to understand. If they cannot provide it, immediately share all the conversation with your manager.

It may lead to nothing. Or discovery that this HR guy seems to always ask women to unblur their cameras and now they got a sexism case on their hands.

Not a racism thing. Happened to me at my last two companies (white guy, both remote jobs).

This is common for i9 verifications.

I work in tech and needed to do this as part of onboarding after receiving an offer. Asking during the interview is a little weird but if they've had problems where their desired candidate didn't have the necessary documents then it makes sense. I wouldn't assume they're wanting to see your house, they're likely just wanting to make sure you won't need H1B sponsorship to get the necessary documents to complete the I-9.

EDIT: Misread the post like an idiot.