That has a very high probability of convincing me not to use that app or service.

I'm imagining inserting a face-swap program into the software stack powering the webcam. I know it's technically feasible with Video4Linux.

I have not used a service with this requirement, and will refuse to at any point. Self hosting, open source, offline.

A lot of this bullshit is pretty easily tricked tbh

https://www.pcgamer.com/hardware/brits-can-get-around-discords-age-verification-thanks-to-death-strandings-photo-mode-bypassing-the-measure-introduced-with-the-uks-online-safety-act-we-tried-it-and-it-works-thanks-kojima/

If it's something like a bank or the government which already know my real identity then I don't really care. For anything else, then I just don't use the service.

You should in the first place avoid them, but if it's necessary :

https://thispersondoesnotexist.com/

Could work

I don't use apps or services that require a photo, video of myself, upload of my ID, etc.

I've never provided a selfie and I never will. When it's demanded, I find another service.

The last time I selfie was demanded was when I attempted to sign up for an online bank, Simplii Financial. SF wanted a selfie and my ID. SF used to have a physical locations one could go to for opening an account. Now it's all online.

Depends on what kind of services... if it's ESTA, visa, official documents basically, or KYC from a bank, well yes, if there is no better way (e.g. cryptographic signature via physical ID card with chip) then I'll do it.

If it's for a random Website they can fuck off.

I've only experienced anything like this once, and it was while trying to sign up for a popular cash (payment) app. I noped the fuck out.

On your ID/pass and maybe your CV. Nowhere else.

I'd look for an alternative. Failing that, I would try every trick to fake that selfie.

I don't care as much about privacy...
I deleted my PayPal account as they asked me for a KYC video.
That's just ID theft waiting to happen.

What are you using that requires a selfie? I can't think of any services or apps I use that require a selfie. It can't be that hard to avoid if I've never encountered one.

If the service has legitimate reasons, like it is a web hosting company or something governmental, then why not. If it is a social network, a game or the like, I will simply not use it.

Using services of a hosting company is something very serious, because the stakes are high, both in costs and in legal responsibility, so most likely you will need to prove your identity. Some companies will even require a meeting to sign a contract.