Earlier quoted context omitted.
The issue you are ignoring is that only one person needs to "save and distribute" it, then the pirated version becomes easier to view than the DRMed version. The proof in the pudding is that every TV show and film is instantly available online to anyone who can work a BitTorrent client.
No, I'm not ignoring those. See my prior comments: - https://news.ycombinator.com/item?id=15279688 - https://news.ycombinator.com/item?id=15279855
Your second point, Denouvo is for video games and is a very different ballpark - it turns out storing code to lock things down is a lot easier in an executable vs in a video. DRM is certainly more effective in games (although the evidence is it causes way more problems for legitimate users, and Humble Bundle et al have proven that users prefer legitimate options when they are easy and affordable).