Have Laminate flooring sales peaked? ;) ;D
fingers crossed

Right lets start with the crits:
ram spreaders are USELESS corsair themselves and OCZ have admited that there own testing shows no or 1-2mhz differance in the max memory clock between non heatspreaderd ram and that with heatspreaders. If you compare the surface area of a dimm with heatspreaders and one without heatspreaders you will notice very little diferance. As there is little extra surface area and the temp differance between the case air and the ram is the same, how would the heatspreaders improve heat disapation? (answer they don't and in some case they actualy make ram run hotter as the thermal interface on the ram isn't toatly efficiant.)
I have never seen a case with copper barbs. There usualy brass. Copper would be too easy to strip the threading off.
Prevent short circuit not electric shock is the puprose of the standoffs.
It's hard to make out from the vid but your thermal paste aplication looks poor and you haven't mentioned cleaning the cpu and fan with meths or isopopnol.
The lighting and shakey camea look pretty bad, you should get someone elese to hold to camera and get a couple of desk lamps.
The floor isn't a good place to build a pc. It's dirty theres a risk of static damage to components and you will ruin your back. Risk of standing on things aswell.
It does matter which way round you put an IDE cable if it has more than one connector on the end. Infact I have never come accross a standard IDE cable that worked both ways.
the video isn't a very good medium for delivering this information. What would work better would be a website with short video clips and much more instructions in text format.
you need to provide instructons for more systems. Your expensive case with quick connet features isn't very tipical and athlon based systems have much better games performance than their pentium equivlents (apart from at the very low end perhaps).