Copyright protection: life + 70 years. But whose life? I know that in most of the Western world, original creative works are protected by copyright for the entire life of the author plus 70 years after the author's death. But how is the term of protection determined when there is not a single identifiable author? For example: For a piece of music recorded by a four-man band, when does the +70 years part start? (presumably on the death of the last surviving band member?) For a motion picture that is produced by a major Hollywood studio, involving the work of thousands of creative staff, how is the duration of copyright protection computed? Whose "life" is the relevant one for calculating life+70 years?
You did not specify a jurisdiction, so this answer looks at the Berne Convention and the United States. To summarize, you are correct about joint works; the "death of the author" is taken to be the death of the last surviving author. The general approach for works with corporate authorship is to specify a fixed term that takes into account both the date of creation and the date of publication, if there is one. Here's what the Berne Convention has to say in Article 7bis: The provisions of the preceding Article shall also apply in the case of a work of joint authorship, provided that the terms measured from the death of the author shall be calculated from the death of the last surviving author. This is pretty clear; your presumption is correct. In article 7, there is special consideration for cinematographic works: (2) However, in the case of cinematographic works, the countries of the Union may provide that the term of protection shall expire fifty years after the work has been made available to the public with the consent of the author, or, failing such an event within fifty years from the making of such a work, fifty years after the making. That is, the copyright term is fixed at fifty years from the date of creation, but if the work is published within that fifty-year term, then the copyright term extends until fifty years after the date of publication. That's the 1971 text; I suppose the specific duration may have been adjusted in the meanwhile. The United States Code, at 17 USC 302, has similar provisions about copyright term in joint works: (b) Joint Works.— In the case of a joint work prepared by two or more authors who did not work for hire, the copyright endures for a term consisting of the life of the last surviving author and 70 years after such last surviving author’s death. In a "work made for hire," the copyright is owned by the employer; this would cover movies and other cases in which the creation is attributed to a corporation rather than an individual. These cases are covered by the next paragraph: (c) Anonymous Works, Pseudonymous Works, and Works Made for Hire.— In the case of an anonymous work, a pseudonymous work, or a work made for hire, the copyright endures for a term of 95 years from the year of its first publication, or a term of 120 years from the year of its creation, whichever expires first. [...] The deleted text concerns anonymous and pseudonymous works.
Provided you are in one of the 170+ countries signatory to the Berne Convention (the current 10 non-signatories are, exhaustively: Eritrea, Marshall Islands, Nauru, Palau, San Marino, Iran, Iraq, Ethiopia, Somalia, and South Sudan), then copyright comes into existence at the moment a work is fixed in a tangible medium, not when it is published. The initial copyright owner is the author of the work. In cases of employment, the "author" might be the natural person who authored the work, or the corporate person who employed the natural author. To clarify your thinking about registration: copyright registration is a public record of authorship (or copyright ownership). Registration does not create a copyright, but is merely a recording of the copyright that was automatically created at the moment of original authorship. Depending on circumstances and jurisdiction, Alan might have a legitimate claim to copyright on his own work. However, he will be quite hard-pressed to find a convincing theory of law that allows him to publish the unpublished copyrighted work of other people without their permission. This leaves him either to admit defeat -- he cannot possibly own the copyright of his coworkers' code, so he cannot have legally reproduced it -- or else make the baldfaced lie that the code has no other authors other than Alan himself. For your company to disprove such a claim, you may employ sworn testimony of your coworkers, you may employ code analysis to show differing coding styles (suggestive of multiple authors), or you may show code backups or version control history showing the progressive authorship of the work over time by many people. (Sure, a Git history is possible to fake, but a realistic history with feature branches, "whoops, undid the typo in the last commit" messages, etc. would lend significant weight to your company being the original authors.)
"that copyright is not automatically conferred and that there is a process that must be followed" No, this is completely backwards. Copyright is automatic (in most places), but there is a formal process if you want. Copyright happens the moment that the work is created. In the US, if you want to sue somebody for copyright infringement, you have to register your copyright, but you still have one regardless of registration. Modifying the video is a derivative work and must be licensed/released from the original author/copyright holder. From copyright.gov: When is my work protected? Your work is under copyright protection the moment it is created and fixed in a tangible form that it is perceptible either directly or with the aid of a machine or device. Do I have to register with your office to be protected? No. In general, registration is voluntary. Copyright exists from the moment the work is created. You will have to register, however, if you wish to bring a lawsuit for infringement of a U.S. work. See Circular 1, Copyright Basics, section “Copyright Registration.”
Works enter the public domain after ... years from publication. In the United States, this is incorrect for some works and incomplete for the rest. Currently, most works are copyrighted for the life of the author plus 70 years; publication date doesn't affect the copyright term. Works made for hire (such as code written for Google by an employee), anonymous works, and pseudonymous works are copyrighted for 95 years after publication or 120 years after creation, whichever is shorter.
No The artwork is all covered by copyright that, in Japan, lasts for 70 years after the death of the last artist. As employees of Squaresoft, the artists don’t own the copyright, Squaresoft (or it’s heirs or assignees do). So, the copyright currently vests with the successor company Square Enix. They are the only organisation with the right to make or licence derivatives. While they currently don’t want to, they might in 10 or 20 or 40 years and any work you made would damage the profitability of that hypothetical project. So it isn’t fair use. So you can’t do it.
It depends on where you are For example, in USA copyright exists in a literary or artistic work stored in permanent form like a book, a movie, an audio recording, a building etc. In contrast, in Australia there is no requirement for the work to be stored - that means copyright can exist in a spoken lecture. The owner of the copyright (usually, but not necessarily the creator) has the right to choose if and how their work is copied and if and how any derivative works may be made from it. For your example, the book is an original work in which copyright vests with the author(s), your notes are a derivative work in which copyright vests in you. However, you presumably did not have permission to make your derivative work so that makes it prima facie a copyright infringement. Fortunately, in the USA there exists a Fair Use defence and in Commonwealth countries the slightly less permissive Fair Dealing defence (if you are somewhere else you will need to do your own research). Search this site or read the copyright article on Wikipedia to learn about these defences. Long answer short (too late!), taking notes to aid your own study is almost certainly Fair Use/Dealing. So is sharing it with your friends. Publishing it may or may not be depending on all sorts of factors; for example, if you were to write a study guide for say a Harry Potter book for use by English literature students this is probably OK even if it is a for profit activity, because criticism is Fair Use/Dealing. Citing work is not necessary to comply with copyright law. Failing to cite may be academic misconduct but that is not a legal matter; its a matter for your academic institution.
The first question is whose law you are concerned with, since in principle you might have violated copyright law in any country, and might be sued under the laws of multiple countries. The US has a concept of "fair use" which is notoriously difficult to apply. When you are sued in the US, you can defend against the allegation by arguing certain things: telegraphically, this includes purpose and character of use, nature of the work, substantiality in relation to the whole, and effect on market. Plus there is a 5th factor to be considered, transformativeness. The court then weighs these factors to decide if the use is "fair". By reading existing case law on the topic (conveniently available from the US Copyright office) you might develop a fact-based opinion of the risk: you would be vastly better off hiring an attorney who specializes in US copyright law to do an analysis for you. Do not hire a programmer to give you legal advice (do not hire an attorney to debug code). You would "fail" on the test of substantiality in that you are copying a highly substantial portion of the original work(s). You would "win" on nature of use (research especially non-profit and commentary are the underlying purposes that drive fair use law). It's not clear how you would fare w.r.t. nature of the work, which is intended to distinguish the extremes "news report" and "literature and artistic work" where copying news is at the fair use end of the spectrum. It is not clear how you would fare on "effect on market", but probably not so badly: are you avoiding some licensing fee? Coupled with the tranformativeness consideration, you are most likely having no effect on the market, since the product that you will distribute is not the original work, but a scientific conclusion about the work. Germany has different laws, and this article would be relevant if you cared about Germany. There was a change in the law that expanded the analog of fair use pertaining to research use. That law allows 15 percent of a work to be reproduced, distributed and made available to the public for the purpose of non-commercial scientific research. That, b.t.w., does not refer to what you are planning to do (unless you also publish quotes); for personal scientific research you may reproduce up to 75 percent. Since this is a new law only a year old, you could become part of the cutting edge in testing the limits of the law. So the standard disclaimer applies: ask your attorney. But note section 60d of the law which legalized data mining, and is squarely on point: (1) In order to enable the automatic analysis of large numbers of works (source material) for scientific research, it shall be permissible to reproduce the source material, including automatically and systematically, in order to create, particularly by means of normalisation, structuring and categorisation, a corpus which can be analysed and to make the corpus available to the public for a specifically limited circle of persons for their joint scientific research, as well as to individual third persons for the purpose of monitoring the quality of scientific research. In such cases, the user may only pursue non-commercial purposes. (2) If database works are used pursuant to subsection (1), this shall constitute customary use in accordance with section 55a, first sentence. If insubstantial parts of databases are used pursuant to subsection (1), this shall be deemed consistent with the normal utilisation of the database and with the legitimate interests of the producer of the database within the meaning of section 87b (1), second sentence, and section 87e. (3) Once the research work has been completed, the corpus and the reproductions of the source material shall be deleted; they may no longer be made available to the public. It shall, however, be permissible to transmit the corpus and the reproductions of the source material to the institutions referred to in sections 60e and 60f for the purpose of long-term storage.
To do so I used some images and Gifs which may be under copyright but since I don't earn money for myself and there is no company backing me I was hoping that there is some protection for private persons like me who just want to showcase the project. Sorry. If your website is public facing (i.e. not password protected and available only to family and close friends), you need to follow copyright law. There is no exception to copyright just because a project is run by an individual for non-commercial purposes. I am also insecure about the GDPR regulations since I give users the ability to create an account and try it out. Your profile says you're in the EU. Then you need to comply with the GDPR. Is there any way to protect me against greedy lawyers and companies? Could I write something like: "This website is a peace of art" and save myself with arguments like "artistic freedom" or "free speech"? Nope. A controversial website run by Peter Sunde had at one point a "free speech" disclaimer (similar to the one you propose) posted. However, Sunde did never use this defense in court: Finnish court slaps Peter Sunde with €350k fine. If he had shown up in court, I am pretty sure the court would have told him that such a disclaimer has no legal merit. The only protection that will make you completely safe is to adhere to the law.