The video player on the content page has two potential layouts for Collections. In a collection, multiple videos are grouped and displayed together on the content page. They can be displayed in a sidebar or as thumbnails below the player.
To edit the video player layout:
-Navigate to the Customization tab
-Click Customize to open the theme editor
-Make sure Content Page is selected and under Blocks, click Player
-In the chapter style dropdown, select Sidebar or Thumbnails