Yes, this is a very critical aspect that needs to be dealt with as soon as possible! Any updates on the subject? I just saw mr and mrs smith on dlive, and also a jackie chan movie! I was shocked!
Personally, I believe that Steem Inc - as they are responsible for the entire enterprise, should do one of the things you mention:
give all the money to the ones that own the copyrighted material, so that they can receive income from it
or have people manually take down stuff that is not legal. Yes, messy - but if we are HUGE, then we've got the capacity to do what governments and judicial aspects want us to do.
Or maybe a combination of both? Those that don't want their stuff on here could for example say they don't want their stuff up, and then Steem inc should be able to "hide" it in the blockchain somehow.....
I learned recently that Steemit actually already removes posts that are subject to DMCA takedown requests - you can see them being added to the code of steemit.com in github in realtime. This ultimately would need to be done for DTube too if they are to conform to prevailing rules in court systems.