Earlier quoted context omitted.
Emscripten cross-compiled codecs are better than black-box, closed source DRM codecs built into partially or fully proprietary browsers like Chrome and Internet Explorer. Do you really think a DRM plugin would ever work in Firefox or Chromium? If they really want to ship DRM, they can do it using the same tools everyone else uses, without special monopoly-preserving treatment or 'protected media paths' or kernel hook…
How can the "lazy big media companies" adapt? What's the DRM-free business model that would allow them to produce the blockbuster movies that are apparently still quite popular with the public?
It's the same as the DRM-encumbered business model: make movies and charge people to watch them. DRM doesn't make that model any more or less effective.