So far it ain’t so, but some form of DRM in HTML is becoming a more likely possibility every day.
The W3C’s HTML Working Group recently decided that a proposal to add DRM to HTML media elements — formally known as the Encrypted Media Extensions proposal — is indeed within its purview and the group will be working on it.
That doesn’t mean that the Encrypted Media Extensions proposal will become a standard as is, but it does up the chances that some sort of DRM system will make its way into HTML.
The Encrypted Media Extensions proposal — which is backed by the likes of Google, Microsoft, Netflix and dozens of other media giants — technically does not add DRM to HTML. Instead it defines a framework for bringing a DRM system, or “protected media content” as the current draft puts it, to the web.