Customizing WordPress media players

Brady Vercher has a really helpful post describing in detail how to customize WordPress' media players.

Working with MediaElement.js can be a bit of a challenge, but his guide shows you how to add classes to be able to set a class with enoughΒ specificity to not pull yourΒ hair out. He also shows how they've customized the players in their audio and video focused WordPress themes, which are quite nice.