The hardware mod looks simple enough, but considering the size and spacing of the components on the board, I would not want to attempt it. I don't have a mac mini but from the looks of the video, these are not normal resisters, but smaller. If you are very experienced with board level repairs okay, otherwise its quite a risk I think of frying something...
I've done board level repairs and replaced components on amigas and older pcs but the components are spaced alot bigger than this kind of tight compact board... Also, you can get a 1.5ghz mac mini g4 for 200$ or less on ebay usually. To me its not worth frying one for 200$
