Why don&#39;t screenwriters get sued more often? Musicians get sued a lot for stealing other musicians work, but movie writers also riff on a lot of the same ideas of one another, yet I never hear of screen writers/directors getting sued. Why is that?
One reason could be because of the scènes à faire doctrine. Many of the things you notice as similarities are not infringement. I don't know the counts of lawsuits for music infringement vs screenwriting infringement. There may just be more songs than screenplays. Screenwriters/producers do get sued, though. See Cinar Corporation v. Robinson 2012 SCC 25.
The relevant law is trademark law. The basic question is whether the mark is identical or creates an unreasonable risk of confusion with the protected mark. There is no per se 30%-40% rule. I can imagine cases where changing a single letter in a long phrase turns a trademark violation into a parody or clearly different mark (see the Electric Company TV show). I can also imagine cases where changing a large part of the mark could still be infringing and confusingly similar. A parody is protected on fair use grounds in copyright law (which could conceivably come into play since this is a derivative work but would be protected since it is a parody), but in trademark law the issue is that a parody is unlikely to be confused for the original. Of course, at a fine grained level when one is looking at particular cases rather than general ideas, you would have to know which country's laws were involved, for example, where the goods would be sold.
Why do you think they have the same shareholders? There’s no reason to believe that they are related corporations just because they share an address. I am shareholder and director of 4 corporations. 3 have the same shareholders in the same proportion. The other has different shareholders. All of them have their registered office at my accountant’s premises. It’s a small suburban practice so there are probably only a few hundred companies at that address. A large city practice would have thousands or tens of thousands. The property management company probably provides the same service.
You can report it to the publisher(s) Protection of copyright is a matter for the individual rights holder: some (I’m looking at you Disney) are vigilant, thorough and draconian in protecting their rights, others don’t care at all. Unless you are the rights holder it’s none of your business. In much the same way that the guy charging your neighbour for 4 hours gardening but being long gone in 2 isn’t. If you like your neighbour or feel duty bound to do something, you tell them and then leave it to them what they do with it. This is not a matter for the authorities as it doesn’t rise to the level of criminal copyright infringement. Just like the gardener above, this isn’t a crime.
Copyright is automatic - it starts to exist when you create a work of a type protected by law. Lyrics are such a work, and thus your lyrics are protected. Even the fact that the lyrics go with an existing (public domain) melody is protected. In addition, your recording is protected. However, the melody is probably not copyrighted, and does not become copyrighted merely because you re-used it. (Probably, because you didn't indicate how old, so I assumed old enough that nobody remembers the origin)
There is no legal difference, really. There may well be a practical difference. It is much easier to steal a wheelbarrow than it is a 20-foot section of 2-foot wide iron conduit. But doing either is theft, and the legalities are pretty much the same. It is indeed easier to copy a song lyric, or a poem, then the text of a novel, say. But if done without permission, either would be copyright infringement, unless of course an exception to copyright, such as fair use (in the US) or fair dealing (in the UK and some other countries) applies. (Or unless the text is out of copyright. One may lawfully copy Shakespeare, for example. Or Mark Twain.)
You are correct that you are inviting a lawsuit if you file a counter-notice. You are also correct that it might be a clerical error. Your attorney is the guy who recommends a best course of action for you. Part of the ensuing trouble would be the bill from your attorney. If the copyright holder wins in court, they could recover from you based on actual damages, statutory damages, and profits under 17 U.S.C. §504. The first is how much they lost (e.g. via sales or licensing fees) from your infringement. The second is a fixed amount ranging from $200 to $150,000, depending, provided that the work is registered. It is more likely that your case would fall in the $200 category, given a mistaken belief that you had permission as innocent infringement. The last is about whatever profits you made from the infringement that exceeds the copyright holder's losses. Incidentally, under the relevant provision, 17 USC 512(g)(2)(C), they will restore your material shortly after receiving the counter notification, unless its designated agent first receives notice from the person who submitted the notification under subsection (c)(1)(C) that such person has filed an action seeking a court order to restrain the subscriber from engaging in infringing activity relating to the material on the service provider’s system or network. Notice that all that YT has to have done is received notification that a lawsuit was filed. The other party does not have to prove to the provider that they filed a lawsuit.
It's not fair use. Fair use is when you do something that normally only the copyright holder can do. Playing a video game is the ordinary, intended use of the work. In the United States, ordinary use is not protected by copyright. 17 USC 106 sets out the rights protected by copyright. The include copying the work, producing derivative works, distributing the work, and so on. None of these are ordinary use. Someone could perhaps argue that you are creating a derivative work. I doubt that argument would work because you are not taking any protectable elements from the work. But if anyone did argue that, it would make sense to also argue that if that's so, your use would still be covered under fair use because it's transformative, does not substitute for the original work in any way, and takes very little of the work.