To show video thumbnails in a Google search result, you need to follow these steps:
- Host your video on YouTube or another video hosting platform. Make sure the video is public and has a clear and descriptive title and description.
- Add schema markup to your website's code. Schema markup is a type of structured data that helps search engines understand the content on your website. In this case, you'll need to add schema markup specifically for videos.
- Submit your video sitemap to Google. A sitemap is a file that lists all the pages on your website that you want Google to index. You can create a separate sitemap just for your videos and submit it to Google using Google Search Console.
- Optimize your video for search. Make sure your video's title, description, and tags contain relevant keywords that people are likely to search for.
By following these steps, you can increase the chances that Google will display a thumbnail of your video in search results. However, keep in mind that Google's algorithms determine what content to display in search results, so there's no guarantee that your video will always be shown as a thumbnail.