PB-427: Release notes 1.3

Added Video support additions and enhancements per review

Author: bdenham

docs/release-notes.md

@@ -15,6 +15,9 @@ The release notes include:
 - {:.new}**Video Backgrounds for Rows, Banners, and Sliders**<br/>
    Page Builder Rows, Banners, and Sliders now have the option to use videos for their backgrounds. These new features are documented here: [Rows](https://docs.magento.com/m2/ee/user_guide/cms/page-builder-layout-row.html), [Banners](https://docs.magento.com/m2/ee/user_guide/cms/page-builder-media-banner.html), [Sliders](https://docs.magento.com/m2/ee/user_guide/cms/page-builder-media-slider.html).
 
+- {:.new}**Video support additions and enhancements**<br/>
+   Page Builder now supports a wider variety of video formats. In addition to YouTube and Vimeo videos, the Video content type and the video backgrounds now support video URL links to video formats like `.mp4` and other browser-supported formats. The Video content type also adds an autoplay feature. These new features are documented here: [Video content type](https://docs.magento.com/m2/ee/user_guide/cms/page-builder-media-video.html).
+
 - {:.new}**Templates**<br/>
    Page Builder now has templates that can be created from existing content and applied to new content areas. Page Builder templates save both content and layouts of existing pages, blocks, dynamic blocks, product attributes, and category descriptions. For example, you can save an existing Page Builder CMS page as a template and then apply that template (with all its content and layouts) to quickly create new CMS Pages for your site. This new feature is documented here: [Templates](https://docs.magento.com/m2/ee/user_guide/cms/page-builder-templates.html).