Synchronizing ingame sounds with video footage for dummies

First of all I would like to state that I so freakin' hate when someone decides to put hitsounds in a fragmovie and they are out of sync (example). They aren't necessary, there are lots of n1 fragmovies without hitsounds, you want your movie to be better/cooler and stand out? THEN DO IT RIGHT!

Let's get down to business.

This tutorial is about synchronizing sounds recorded using wav_record. The way I use isn't perhaps the fast