The web was more open when to play those videos you had to use a proprietary Flash or Silverlight plugin?
That's what you are claiming with your sarcasm hidden behind a rhetorical question, I've never said anything about Flash or Silverlight in the comment you've answered to.
There is absolutely no difference from a conceptual perspective between EME implementation and proprietary plugins, EME is necessarily based on a proprietary spyware, but you can't fathom that fact apparently.
DRM as implemented by EME is necessarily a closed source, proprietary plugin just like Flash, I never said that Flash was just a DRM. Flash could be used as DRM system, in fact its video format FLV supported DRM.