views – How do I resize remote video thumbnails?

I have a view which displays a selection of remote video media in a grid using the oEmbed format option. Updating my site from Drupal 9.0.9 to 9.1.0 caused all my remote video thumbnails to shrink to 200×113 pixels, which is far too small on a desktop.

I don’t know what size they were exactly before the update, but I want to make them larger. I have added max height/width dimensions to the remote video media type’s display manager and this has successfully resized the thumbnails of videos added to simple posts using the “insert from media library” button, however this has made no difference to the thumbnails in my view.

Can anyone help?