Virtualdub modifid: what's it for

[elbo]

I know I asked this question before but I need the answer in layman's terms. What is virtual dub for?

[Kariudo]

I don't think I can put it in an easier way to understand than before.
there are many uses for vdub(/mod), the primary one (at least its primary use to people on this site) is to encode video.

[Minion]

for cropping, resizing, adding cleanup filters, compressing, and encoding.