How do I add a custom thumbnail and titles to Paragraphs native videos

Paragraphs module allows me to upload my own mp4 videos and they work great. I wish the add custom thumbnails and description under the video to further improve the user experience. How can achieve this without using a third party app like Vimeo or YouTube (I prefer hosting my own videos)?

Related module: https://www.drupal.org/project/paragraphs

Drupal version: 


Source: https://www.drupal.org/taxonomy/term/22/feed