Tests on HTML5 video and CSS

This tests focus on the HTML5 video element and CSS. They're as follows:

1. HTML5 video and CSS: basics
   Inserting the video element with some attributes.
2. HTML5 video and CSS: default display value
   Default value for the display property of the video element.
3. HTML5 video and CSS: applying styles
   Basic box model properties, display role, background.
4. HTML5 video and CSS: floating and positioning
   Floating and positioning.