Microdata helps search engines better understand the content of your website. They are the prerequisite for displaying rich snippets in search results pages. For example, rich snippets are thumbnails of videos and can increase the click-through rate (CTR) of your search results.
Two steps are necessary to make your site eligible for video rich cards and rich snippets in search results:
There are several ways to generate a video-sitemap.xml file.
It is a markup for video content. With this structured data you provide an entry point for discovering and watching videos in Google Search. You can provide details such as the description, thumbnail URL, upload date, and duration by marking up your video with VideoObject.
In the Google Search Console you get an notification, if the markup is not correct. You can use the Video markup generator to generate a wellformed markup for YouTube videos.
You have to create a Video schema with this generator, insert the code on your page and place the Video visible on the page. Then the search engine bot will recognize it and index it.
Make sure to check the official definition of fields for VideoObjects at schema.org.
For further information on the topic and common errors when implementing structured data for videos, check the Google Developers documentation.
Quick and Easy way to integrate the Video-Object Schema into my site
Jeff Atwood
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Marc Steinfeld Head Of Online Marketing