Which technological advancement has made including video in web pages easier?

The inclusion of video in web pages became significantly easier with the advent of HTML5. This revision of the HTML standard introduced native support for multimedia elements, notably the <video> tag, which allows for the embedding of video content directly into web pages without requiring additional plugins or complex workarounds.

With HTML5, web designers can easily integrate video by specifying attributes such as controls, autoplay, and loop directly within the tag, enhancing the user experience. This simplification of the process means that videos can be played across various devices and browsers without compatibility issues, streamlining web design and development.

Other options, while they may have had roles in multimedia presentation, do not offer the same straightforward, standardized support for video content that HTML5 does. For example, Flash Player required the installation of a separate plugin, which created accessibility issues and hindered usability on mobile devices. HTML4 and CSS3 do not provide built-in capabilities for video embedding in the way that HTML5 does.