Hobbyists might enjoy building a Hackintosh -- in the sense discussed here, a PC running Mac OS assisted by "OSx86" technologies that evolved from developer kits for transitioning from the G5 to MacIntel. It seems akin to cloning the BIOS of the original IBM, and not quite the same as running a virtual machine like VMware.
Lifehacker has a walkthrough on how to Build a Hackintosh Mac for Under $800, and UNEASYsilence does the same for the $300 ASUS subnotebook in Load OSX 10.5 Leopard on the eeePC.
I'm not sure why someone doing video would spend too much time on this, but I keep hearing about it because of the low cost of building a PC Frankenstein. You might remember that Victor Frankenstein shirked responsibility for his actions and rejected the creature out of fear; only after this neglect did the creature became a monster.