This is a very clever idea via Arthur Corenzan. Rather than use the default YouTube embed, which adds a crapload of resources to a page whether the user

Persistent headers can be useful to users if they are unobtrusive, high-contrast, minimally animated, and fit user needs.

When we produce a PNG image, we use an tag or a CSS background, and that's about it. It is dead simple and guaranteed to work. PNG is way simpler to use