On the Link it is mentioned that gdata client for objective c is deprecated. Does anyone know what is the alternative way to upload videos to youtube??
The GData library is not deprecated, only the old versions listed on the download page are.
As the summary on the first download says:
Visit the Source Checkout page and use the svn command shown
Click on the Source tab towards the top of the page and you will find the latest version, which has a lot of changes since the last download that they provide (1.12.0)