PARC: Repetition
YouTube
Official page

This page sets a perfect example as it renders objects of the same type and size as songs. The arts of songs of albums work as refreshers, but the same objects and shapes are repeated throughout the page without being monotonous.
PARC: Alignment
Sony/Playstation
Official page

I think this is an excellent example of alignment and positioning as the page works with high definition images and shots from 3D videogames, which makes it extremely challenging. Optimizing this types of pages for mobile screens is a difficult task.
PARC: Contrast
Netflix
Official page

Netflix does an amazing job in contrast and creative desgin. The background provides context about the nature of the page and at the same time gives a really nice look mixing movie posters, information and visual elements.