The Video and Rich Media feature of SharePoint enables the asset library, a type of document library. The asset library can help you manage rich media assets such as images, audio, and video, especially for SharePoint 2013 and 2016. For SharePoint Online, see What is a document library?
To enable the video and rich media feature, you must have permissions to change Site Collection features.
On the Site Settings page, under Site Collection Administration, click Site collection features.
On the Site Collection Features page, under Video and Rich Media, click Activate.
Click New Item on a library page, or the New Document button on the ribbon. When you select video from the list, you have the option to upload, link or embed a video.
To learn more about how to add content to an Asset Library, see Upload video, audio, or pictures to an Asset Library. To learn how to embed a media file on a SharePoint page, Add video or audio to a page.To discover how to create a thumbnail, see Capture or change a video thumbnail.