[_yawn]

Content and presentation both change, and together. That's how it's always been for every type of media. How much space you have on the newspaper determines what your article's title is, but what the title is also determines how much space you have.

[dkonofalski]

No they don't. I can write a paper or a thesis without any worry about how it's going to look visually to the person consuming it. I can post a video of something without any kind of concern for what size, container, or surrounding content might accompany it.

Content is content. Presentation is how that content is displayed. While they can work together, the content is the most important thing and presentation should always be secondary to it.