Yeah, I often read about porn sites for their engineering (I'm not being sarcastic, I mean that 100% sincerely). It's a shadow world that counts among it some of the most highly-trafficked sites on the internet - and then bear in mind that most of the few sites above them are not devoted to serving high-quality long-duration videos. These sites are phenomenal feats of engineering. Anyone who discounts them just because of some silly pudeur about their content is not an engineer in my eyes.