Schema.org is a collaborative, community activity with a mission to create, maintain, and promote schemas for structured data on the Internet, on web pages, in email messages, and beyond. Schema.org vocabulary can be used with many different encodings, including RDFa, Microdata, and JSON-LD. These vocabularies cover entities, relationships between entities and actions, and can easily be extended through a well-documented extension model. Over 10 million sites use Schema.org to markup their web pages and email messages. Many applications from Google, Microsoft, Pinterest, Yandex and others already use these vocabularies to power rich, extensible experiences.
Founded by Google, Microsoft, Yahoo, and Yandex, Schema.org vocabularies are developed by an open community process, using the firstname.lastname@example.org mailing list and through GitHub. A shared vocabulary makes it easier for webmasters and developers to decide on a schema and get the maximum benefit from their efforts. It is in this spirit that the founders, together with the larger community have come together – to provide a shared collection of schemas.
Schema plugin, however, plays nicely with Embeds, the easy embedding feature powered by oEmbed. The plugin integrates with the most popular video service providers that are supported by Embeds. This means, for example; when you use Embeds to include a Youtube video into your post in the Editor, Schema will try to discover the details out of the embedded video. In some cases, the video details are missing some required details, or it’s not provided in Embed, Schema then it allows you to add those missing details.
Once you enable the VideoObject feature, you will see a new post meta box in Schema Types screen. This is where you can select to markup only a single video or more than one video on the same page. These settings shall take place across the enabled post type.
Note: The plugin doesn’t fully support the Multiple Videos!
You can enable markups for multiple videos on the same page. However, this may slow down your site, make sure your site is hosted on a reliable web host and cache your site pages by a good caching plugin. Click to Read More!