Retrieve Comments parent on polymorph relationship with only specific columns

Based on Laravel example Comment has polymorph relationship with Post and Video Model.

I can retrieve Comment with Post and Video using $comment->commentable, but it return all columns of Post or Video. Post has id, name, other columns... Video has id, title, other columns...

How to limit certain columns ? I want for Post only id and name columns and for Video only id and title columns

->with(['commentable' => function ($query) {
          $query->select('id', 'name');
      }])

This code will error since Video doesnt have name columns.

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