There is a serious safety hatch on Google’s Two-Step Verification
the first thing the hacker does is change the phone number for Login and Reset
Google have used pop-up windows in the YouTube app
and the hacker logs in and clicks yes it was me
then he uploads one or two Crack video to your account and it is clear 
Read more on Svendus Blog a Blog about panorama
Blockquote * Secure your YouTube account
Feel free to check the Google Account Help Center page for any concerns you may have on your Google account security.