Hi Pratap--
It may be possible that links are moved or not available. We can help to provide the information from tech net if you are looking for any specific article/video.
I tried a few but didn't get 404 errors but I agree with you sometimes the documentation is not updated. You may provide the feedback to technet.
http://technet.microsoft.com/en-us/cc512759.aspx
https://lab.msdn.microsoft.com/mailform/contactus.aspx?refurl=http://technet.microsoft.com/en-us/cc512759&loc=en-us
Hope that helps.
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