Generally, the Download This Video button will appear only if you have the latest version of RealTimes. After re-evaluating market trends, we have decided not to make RealTimes available on Windows XP or Vista.
We are no longer making updates to RealPlayer Cloud, RealPlayer 16, or older versions, so we cannot guarantee that Download This Video will work when those versions are installed.
You may also refer the below article:
Note: The most current version is RealPlayer with RealTimes, available for customers on Windows 7 and higher (or Mac OS X 10.10 and higher).