copy and style changes for the Video celebration modal used by VideoPress onboarding
run install-plugin.sh editing-toolkit update/videopress-onboarding-celebration-modal on your wpcom sandbox
go through the onboarding flow to the point where you upload your first video and save the page
NOTE: If you want to test with an existing site instead of setting up a new one, you can set wp-content/plugins/editing-toolkit-plugin/prod/wpcom-block-editor-nux/class-wp-rest-wpcom-block-editor-video-celebration-modal-controller.php on your sandbox to return false on line 86.
you should see the new celebration modal
Launch the Welcome Guide, and confirm that the video specific images are still displayed