[ds9]

The problem with this interpretation is that in the vast majority of cases, one cannot know whether downloading is authorized or not.

Virtually every video, audio or text file of works created in the past century, more or less, is copyrighted. That alone is not the relevant criterion. The criterion of infringement is whether the particular action is authorized by the copyright holder. But this, no one can routinely know in the course of internet activities.

There is no central or public database of works that would reveal even who the copyright owner is - and even if there were, it would have to also record the authorization status of everyone in relation to every work.

So you are looking around online and someone is offering a file - if you are subject to lawsuits, fines or whatever other interference for downloading, then in principle it's not safe to even look at a web page. What the new rule amounts to in practice is something like "well if you infer that the web page is intended to be retrieved, you're probably safe, but you can be penalized for guessing incorrectly about music or videos". (Note that movie companies have actually sued youtube/Google over files including some that the movie companies themselves published on youtube.)

It simultaneously keeps everyone continually vulnerable to selective enforcement by private companies (specifically, big copyright accumulators), and casts a chilling effect on the relationship of fans with artists who would like to release works on more liberal terms than Hollywood companies (can you trust a statement on a web page that something is authorized???).