youtube_oauth_request_token.rb

require 'rubygems'
require 'oauth'

KEY = "replace with your key"
SECRET = "replace with your secret"

consumer = OAuth::Consumer.new(KEY, SECRET, {
  :site=>"https://www.google.com", 
  :request_token_path=>"/accounts/OAuthGetRequestToken",
  :authorize_path=>"/accounts/OAuthAuthorizeToken",
  :access_token_path=>"/accounts/OAuthGetAccessToken"})

request_token = consumer.get_request_token({}, {
  :scope => "http://gdata.youtube.com"})

request_token.token          # The request token itself
request_token.secret         # The request tokens' secret
request_token.authorize_url  # The authorization URL at Google