Hi @boxcarlo
To create a post format archive page, kindly check this page: http://wpsites.net/wordpress-tips/post-format-archive-page-for-specific-post-formats/.
In the template file, you should be able to get the custom field value as usual. This page should give you more idea about it: https://www.advancedcustomfields.com/resources/displaying-custom-field-values-in-your-theme/.
I hope this helps 🙂
