Getting targetFeedReadOnly error in simple YouTube search query

im beginner in the YT api , i trying to query YT api with search query

from c++ http client with post request

the request string looks like this :

 http://gdata.youtube.com/feeds/api/videos?max-results=10&orderby=published&q=Skinny%20puppy&start-index=1&v=2

no headers and no autontication has bean made and the error im
getting :
 <errors xmlns='http://schemas.google.com/g/2005'>
<error>
<domain>GData</domain>
<code>targetFeedReadOnly</code>
<internalReason>Target feed is read-only</internalReason>
</error>
</errors>

开发者_运维百科why is that , im doing what it said in the documention.

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Make sure that you make a "GET" request to this url. "POST" or "PUT" did not work...