It's been brought to my attention that the MSDN table of contents (TOC) is having some problems, at least in the "Audio and Video" node of the MSDN Library.
1. The TOC for the Media Foundation documentation is out of sync. Anything that is new for Windows 7 is not in the TOC. So if you navigate through the topics in Media Foundation, you wil find lots of "orphaned" pages.
Update: This issue has been fixed.
2. The latest version of the DirectShow documentation has a new URL, and the old link points to an older version of the documentation. The latest DirectShow documentation is here: http://msdn.microsoft.com/en-us/library/dd375454(VS.85).aspx
Update: No ETA for fixing this issue.
I do not have an ETA for when these issues will be fixed. Apologies for the inconvenience. My only advice is to install the Windows SDK and use that documentation.