Update designer

[mister-ben]

Designer pen uses Video.js 5.

https://github.com/videojs/videojs.com/blob/379f9b0a2b463c6d56cde5eb3861f5d3754be88a/src/mdx-pages/getting-started.mdx#designing-your-own

[heff]

I was hoping to just be able to update the version, but because of the skin changes and variables in the codepen SCSS I'm not sure it's that easy.

Should we just remove the designer from the readme?

[mister-ben]

Updating the version works. There is also an issue that codepen has changed the class of the style el.

https://codepen.io/mister-ben/pen/ZEepwVo