I was traveling for work to another country. I went to launch Steam to play a local game and either because the network was misconfigured, Steam didn't like me being in another country, or something else I don't care about, I couldn't launch it to play my downloaded, single-player game. I live in a major US city with Internet from a major cable company. Hulu tells me I'm using a proxy and won't let let use the website anymore. When emailing support they offered no help. Back when iTunes had DRM I was at a wedding at a location without Internet. The bride/groom planned their own music but hadn't authenticated the computer with the playlist for the wedding. These are all companies with more "user-friendly" DRM than most.

I like downloading lectures and conference talks. I'm concerned if major video host, like YouTube, were to adopt this I won't be able to download these things and watch while commuting or traveling. It could just as easily happen if Netflix becomes the only host for public domain content or opens to user-submitted video.

Also, EME isn't limited only to traditional Movie & TV uses of video. It could be used for web-like content (rendered and encoded at the server) with un-blockable ads.

The net effect of this was that the average video on the internet was not DRM'd, and couldn't be without losing significant potential marketshare. Once all browsers natively support DRM this will likely change.

Nonsense. Folks have installed Flash forever in order to watch cat videos. Youtube was Flash based and Flash has even been bundled with Chrome. If folks have wanted to DRM their cat videos they've had the ability and its not happened. Its not client side compatibility thats prevented this its that the DRM encoding and streaming costs and complexity that make this a poor choice for content providers.

Flash has (had?) already won. Everyone already has it installed: almost all consumer computers have it installed by default and Chrome runs it without even having the adobe software installed.

I think it is an absurd claim mistake that a random website running silverlight would have remotely the same view rate as one using flash. That delta cost more than outweighs the tiny benefit of DRM, and when everything is HTML5 video and DRM comes with actually zero cost to potential users it will be significantly more widespread.