The download is a zipped package of size less then a megabyte. Get it from the official website at http://www.virtualdub.org/, or for v1.6.0 from this link at SourceForge.net: http://prdownloads.sourceforge.net/virtualdub/VirtualDub-1.6.0.zip?use_mirror=optusnet. The file name includes the version number, so your downloaded file will be something like
Install by extracting the zipped files to any folder. An installation process isn’t required. You can use WinZip to extract files from the zipped package, available from http://www.winzip.com/.
Be sure to tell the unzip utility to include folders in the unzip operation as some of the files need to be in their own folder. The following figure ...