If I'm not too late with my reply then you can try, 'Hushed'. It's an App you can download for either Apple or Android.
It gives you a free US number, it's not able to receive SMS messages but it can receive calls, so can you request YT to send you a voice call with the verification code.
Once you've downloaded the App, you just create an account by entering you email, then they email you your password and you get a free number. You can sign out of your account once your done with your number and create another account and get another free number. There doesn't seem to be a limit to how many accounts you can create.
No doubt this will get patched soon, but so far it's working really well. I've used it for eBay verification, YT verification, etc.
Also I was able to download this App and I'm in the UK, so it's not just for USA.