Problem with YT

The problem is the following:
I can log into my account. Uploading video.
And last moment receive an error.
And the inscription: Google Accounts: Unable to access a Google product. What am I doing wrong?
I use different proxies, different files, different file names.

it is the problem with your account provider. Ask him about the problem. Probably the accounts are created with bad proxies so they are banned.

Or may be you are using bad proxies so accounts are getting banned as soon as you log in. hope it helps