HTML5 on ülemaailmse veebi tuumikkeele HTML viies põhiredaktsioon.
While companies from Google to Apple to Microsoft voice their ardent support for HTML5 and developers rush to show off the fun tricks it can do, those who actually oversee HTML5 are telling the world to cool their britches. As an official from the World Wide Web Consortium (W3C) told reporters today, “There is already a lot of excitement for HTML5, but it’s a little too early to deploy it because we’re running into interoperability issues.” Particularly when it comes to video content, different devices and different browsers aren’t handling HTML5 consistently.