I don't see what does it to differently from usual keyboards, other than letters flying all around the screen, which don't add any new functionality. Maybe video just doesn't cover that? What's different about your keyboard, what can it do better that your typical Gboard can't?
Yes, I do have session in my browser and I would use it as a second factor to manually approve every login to my account from my browser if I had option to do that, but Google doesn't allow that. You can only confirm logins from android or apple device.
It worked for me and I did not have to give Google my phone number to "unlock" the other 2FA options and subsequently app passwords. I used the Yubikey, but I think it should work if you only use TOTP.
I might do this (install an emulator and use auth app there) if I can successfully login from it, I just need a lot of time to do that (internet here is really slow).
I asked one of my friends with faster internet to do that for me but google blocked an attempt to login with correct username and password.
I think if I'm gonna pay for using email, I'll just try to get any cheap VPS/domain and try to run my own email. It'll be more expensive for sure, but at least it will be my own thing I'm paying for.
Just depends whether or not the effort it takes to find a VPS company whose IPs aren't blocked by major email providers, and then ensuring that your emails continuously make it through to their destinations, is worth the cost savings.
I share your sentiment, but I opted for Fastmail because the effort wasn't worth the savings. YMMV, obviously.
The problem with running your own email is getting past the spam filters.
The big email providers have basically built a walled garden around email by blocking anyone outside the garden as spam. They have no incentive to open the system to people who run their own email.
https://openrss.org/blog/youtube-feeds