Hey!
Thank you for getting in touch. There is not a way to disable by CSS, however if you want to disable Humix videos on certain pages you can do so via the URLs of the pages you want to exclude.
To set this up go to your Ezoic dashboard > Humix > Site > Disable Embed by Page
Simply select add a new page and you can set up which pages you do not want the ads to show.
Thank you.