[YouTube-API] Using a sessionToken two times

Hi, i would like to update some video descriptions. I do it without
problem on a page where i get a token , but i would like to do that on
another place (in a controller) but i fail at the moment to exec
$video->getEditLink()->getHref();.

I think it's because i don't have anymore permission in my controller,
to do that, i send the sessionToken that i generated previously in my
view, and i use it again (in my controller).

Apparently this method is not working.

Let's see some code:

In my view (That's work):
$sessionToken =
Zend_Gdata_AuthSub::getAuthSubSessionToken($_GET['token']);
$httpClient = Zend_Gdata_AuthSub::getHttpClient($sessionToken);
$yt = new Zend_Gdata_YouTube($httpClient, $applicationId, $clientId,
$developerKey);
$videoFeed = $yt-
>getUserUploads($userName);
foreach($videoFeed as $video)
{
$description = $video-
>getVideoDescription();
$video-
>setVideoDescription($description);
$Url = $video->getEditLink()-
>getHref();
$yt->updateEntry($video,
$putUrl);

In my controller ($video->getEditLink()->getHref() fail)
$sessionToken = $_POST['sessionToken'] (this one i used on my view
just before)
$httpClient = Zend_Gdata_AuthSub::getHttpClient($sessionToken);
$yt = new Zend_Gdata_YouTube($httpClient, $applicationId, $clientId,
$developerKey);
$videoFeed = $yt-
>getUserUploads($userName);
foreach($videoFeed as $video)
{
$description = $video-
>getVideoDescription();
$video-
>setVideoDescription($description);
$Url = $video->getEditLink()->getHref(); /
*FAIL*/
$yt->updateEntry($video, $putUrl);

thanks for help !

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