I recommend you watch both, they are both good, the V8 one in particular really got my juices going (man, I'm such a geek).
All of this machine hackery inspired me to look again at x86 assembly and architecture (and maybe I'll look at ARM next). I used to think x86 assembly was a big scary mess and best shyed away from. I've always output JVM or MIPS assembly in compilers etc. for this reason. Bu actually, x86 is not too bad! There's a few more instructions that do some pretty interesting things, but it really isn't much worse than other assembly languages. And I find it really interesting finding out how the processor works; maybe there's a closet bit-jockey in me after all.