I had stumbled upon this video before too. Look up Rocky Mountain ATV on youtube and their are some great "how to" videos. He explains what he is doing as he does it.
i don't recommend using a hammer to put the cases together because it can collapse the bearings on crank. but seems like he came out ok.
o he also left out pulling out at least one head stud, breaking off one of those little bolts in the pressure plate...wait i guess thats just my luck lol