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.
Comparison of HTML5 and Flash
Apple has been promoting HTML5 as an alternative to Flash for video and other content on the iOS, citing performance reasons for not allowing Adobe Flash Player to be installed on iOS devices, including the iPhone, iPod touch and iPad. Flash applications can be packaged as native iOS applications via the Adobe Integrated Runtime and the iOS Packager.