The problem with PIV, as with a few other video services, is that it uses DRM. AS you're probably aware, there are some quite unfortunate laws around that which prevent anyone from just offering an alternative implementation of a DRM system. Hence, we can't even try. That's not to say that we won't ever be able to offer at least some support for services like this, there might well be ways to work out something clever.
Isn't EME supposed to address that? Or is that not adaptable to non-HTML5 video (even though this is, technically, HTML5+Javascript that happens to be able to play Flash animations)?