Vimeo doesn't offer a built-in vertical embed option, but you can easily transform any standard Vimeo embed into a 9:16 vertical player using custom CSS. This approach gives you full control over the player's dimensions while maintaining the responsive functionality of Vimeo's iframe embed.
The technique involves two straightforward steps: obtaining Vimeo's standard embed code and then applying CSS to force the player into a vertical aspect ratio. This method works ac...