The Biden admin disabled comments on all official The White House channel videos pretty quickly into their administration.
Most videos have a tremendously high dislike to like ratio, the most recent is 3.4K dislikes to 205 likes. I don't know who they expect to consume their Youtube content but it apparently isn't the establishment's voter base.
This is another brick in the wall that is Youtube that just fell out if you ask me. Content creators of all stripes are absolutely desperate for an alternative platform.