OK now I'm having the same issue. I'm trying to add YTTV to my sources remotely (meaning from somewhere outside my home), and I'm getting stuck on the NBC captcha screen. I've logged into the NBC live website with the email address, logged into YTTV on my phone then tried to add the source, and I'm still getting stuck at the same point (the NBC captcha screen).
This is getting frustrating, so if someone can help, I'd appreciate it.