Hi Craig, yes Vimeo and computers that can play H.264, which is pretty much every computer, can also playback x.264.
The link to the x.264 component in the article is to MyComet3G’s component, which is good and widely used, but he stopped developing it a year or two ago. I prefer Handbrake because it uses the latest implementation of x.264. Also, the Handbrake x.264 preset slider is the same as the tune options the article talks about. Same thing, different interface.
I would go with whatever you feel comfortable with.
@ericstrand11