I noticed in some videos cameras peering through the window of an airliner showing water droplets, particles of dirt on the window.  How do you get that effect?

My guess is that stuff is done in post-production using Adobe After Effects... it's definitely not in FSX, though.

That is why I rarely look at FS videos, hard to know what is FS and what isn't.

I haven't even figured out how to get the window view that seems popular in those videos let alone the special water effects and everything haha. It seems like an extremely complicated process.

If you have EZDOC, simply use your arrow keys , page up , page down and mouse. If you're at the tip of the wing facing the plane, use your arrow key and go right into the fuselage.