Google's plans to establish TV on YouTube may involve no less than creating a full-fledged alternative to conventional broadcasting, rumors maintained on Thursday. A pair of sources claimed that Google was spending up to $500 million to $600 million, considerably more than the $100 million it has officially detailed, to get professional video content. SAI understood proposals were being made not just to the independents already courted for YouTube but cable channel creators and even those for whom video was just a secondary business.