Crude and even a bit juvenile, granted. Some underlying truth, too. Brand trumps technical arcana. We drown in a simulacra of Brands. And by the power of Grayskull, that’s one awesome brand.
The website at the end might be worth a peek. This clip’s authors used that site’s pre-made templates. All they did was type in the dialogue they wanted. The vocal translator seems to be the same engine that AT&T Labs released as a partial freebie to the general public years ago. It’s got limits. So if you start to make your own movie – and why not have fun? – expect to have to tailor your text a bit to overcome the vocalizer’s limitations.