HTML5 video
Support for HTML5 video has been steadily increasing. In June 2013, Netflix added support for HTML5 video. In January 2015, YouTube switched to using HTML5 video instead of Flash by default. In December 2015, Facebook switched from Flash to HTML5 for all video content.
HTML5 in mobile devices
Microdata, 3D animation rendering, FileReader API, IndexedDB, and local device support or the WebWorkers feature respectively are the top five HTML5 features not supported across the top 15 mobile devices in all USA, UK, Germany, Malaysia, Australia markets examined.