I am sure as a reader you have either watched Playing Games with Snat, heard about it or have found this link via Google as you are doing your own Lets Play or having problems overlaying audio with footage.
If you are having this problem then carry on reading and if not, why are you here?
The main problem most people have (and the same one I did) is assuming that the audio is recorded as a fix length of time – aka if you recorded 30 minutes of gaming footage and 30 minutes of commentary that it will overlay without any problems. This is not exactly true as I have discovered sampling is what really matters and then secondly making sure audio is recorded without any skips.