Can a song be used in a presentation for work? Does it fall under that Fair Use Act of 1976 to include a song as the intro to a presentation for work if the presentation is being given for educational/teaching purposes?
The educational/teaching purposes do not apply to any copyrighted work that you chose to include in the educative material that you might produce. The educational/teaching purposes means education refering to or related to the work being used. If your presentation is about the musical styles of the 70s, you can use a 70s song to show how it matches those styles, its impact, relevance... But you cannot use the same song as soundtrack in a presentation about how to properly fill the X-520 form. It also usually requires some depth. So, your presentation being just &quot;These are some songs from the 70s&quot; and playing a few hours would not cut it, even if it serves for some in your public to listen (learn) new songs.
In general, using content provided by another who incorrectly posted it under a permissive license, such as a CC license, does not grant a valid license from the real copyright holder. That is, if A writes some code (or a song, or creates an image, or whatever else), it is protected by copyright. If B then posts it to the web, with a statement that it is released under a particular license, without having obtained permission from A, then B's &quot;release&quot; is of no value, because B had no rights to grant. If C downloads and uses this content, relying on B's license, then A could take legal action against C. C would probably be considered (in the US) an &quot;innocent infringer&quot; which reduces the minimum statutory damage amount, but does not otherwise change C's legal position. A could, if it chose, bring suit and possibly obtain a judgement including some damages. But to return to the practical case of code posted on one of the SE sites. Given the comparatively short code sections usually posted, and that they do not usually form a complete working program, and given further the stated educational purpose of SE, it is likely that in US law such a posting would constitute fair use, and in the law of other countries fall under one or another exception to copyright. That is a general conclusion, the details would matter. I have not heard of a case similar to that suggested in the question. I find it unlikely that an SE poster would post copyright-protected code without permission, that is valuable enough to be worth an infringement suit, and substantial enough and having enough effect on th market for the original to be outside the protection of fair use. Such a situatiion is, of course, possible, even if unlikely. Note that a cease-and-desist letter is not a court order, and is really only a threat of court action. its only legal effect is to put the recipient on notice, so that continued infringement is not without awareness of the copyright claim. To have legal effect the claimant must actually bring an infringement suit, which is not without cost.
The commentators are just making stuff up when they say that you can freely infringe on copyright as long as it is for personal use. It is true that "personal infringers" are less likely to suffer the legal consequences of any infringement (partly because it's easier to avoid detection and partly because the hassle to award ratio involved in suing a personal infringer is too high). It's a misunderstanding of "fair use", based on the legally erroneous assumption that anything is okay until you make a business out of it.
Making and sharing and using subtitles for movies is not legal. It is copyright infringement. I paint this statement with a very broad brush. The movies are copyrighted (they are original and fixed in tangible form). (17 U.S. Code § 102(a)) 17 U.S. Code § 106(2) provides that the owner of copyright has the exclusive rights to prepare and to authorize to preparation of derivative works based upon the copyrighted work. 17 U.S. Code § 101 defines derivative work as a work based upon one or more preexisting works, such as a translation, musical arrangement, dramatization, fictionalization, motion picture version, sound recording, art reproduction, abridgment, condensation, or any other form in which a work may be recast, transformed, or adapted.... So we have established that the copyright holder has exclusive rights to authorize translations, but this exclusive right is limited by fair use. 17 U.S. Code § 107 provides some examples of fair use: criticism, comment, news reporting, teaching (including multiple copies for classroom use), scholarship, or research If these subtitle files are not used for a fair use purpose (the examples cited are examples only, not an exhaustive list) then translation is infringement. If the files are used for one of the fair use purposes then § 107 also gives us the factors to determine whether that particular use is fair use: (1) the purpose and character of the use, including whether such use is of a commercial nature or is for nonprofit educational purposes; (2) the nature of the copyrighted work; (3) the amount and substantiality of the portion used in relation to the copyrighted work as a whole; and (4) the effect of the use upon the potential market for or value of the copyrighted work.
&quot;public performance&quot; is a term used in copyright law mostly for music, dance, drama, and audio-visual works, where it means to actually perform the work in front of an audience. For a book it could mean to read the book aloud in front of an audience. It is not largely used for software. I suppose that demonstrating or running the software in front of an audience would be a public performance. Running the software and using its output in a publication would not be a &quot;public performance&quot; as I understand it. As long as the user has the right to access the software, which normally includes the right to run it, the output may be used with no further or special permission.
You are absolutely allowed to discuss or describe or criticizes software (or books or other copyrighted or trademarked things) without any permission from the copyright holder or trademark holder. This includes teaching people how to use those things. You may not, however, copy protected software without permission. For example you could not include a CD with a copy of Windows 10 as part of a course you taught on using Windows 10, without permission from Microsoft. Also, you may not use a trademark in such a way as to imply that your course is approved or endorsed by the trade mark holder, or by the maker of the trademarked item. If reasonable people could think that your Windows course was approved by Microsoft, you are probably infringing their trademark. Use of screenshots is more of a grey area. Such use, for purposes of teaching or of commentary, is probably covered by fair use (in the US) or fair dealing (in any of several other countries). But that is always a case-by-case determination, and depends on the exact facts, such as how extensive the use is, and whether it in any way harms the market for the original. If in doubt consulting a lawyer experienced in IP issues is wise. But aside from the issues of screenshots, the makers or copyright or trademark holders of software have no right to grant or withhold permission to one who teaches about the softrware, nor to demand any fee from any such person.
On the face of it, transcripts are derivative work covered by copyright (even if automagically generated). You are allowed to use them if the use is fair use or if you comply with YouTube's terms of service.
The current version of copyright law in the PRC is here. Art. 10 states what is protected, which includes the standard rights of distribution, copying, modification and so on (which makes software cracking illegal). Article 22 gives the equivalent of the Fair Use limitation on copyright protection: a work may be exploited without the permission from, and without payment of remuneration to, the copyright owner, provided that the name of the author and the title of the work are mentioned and the other rights enjoyed by the copyright owner by virtue of this Law are not infringed upon for 12 specific reasons (translation into Braille or a minority national language, free public performances, quotation to make a point end so on), which includes some potentially applicable reasons (1) use of a published work for the purposes of the user's own private study, research or self-entertainment (6) translation or reproduction, in a small quality of copies, of a published work for use by teachers or scientific researchers in classroom teaching or scientific research, provided that the translation or reproduction is not published or distributed (7) use of a published work by a State organ within the reasonable scope for the purpose of fulfilling its official duties It is unclear what "State organ" refers to and it is unlikely that a university is a "State organ". It is unlikely that (1) and (6) are interpreted as an across-the-board "education exception" to copyright, but that could be an avenue for legality. The standard misconception of copyright law is that anything done for educational purposes is allowed, and the PRC law seems to have at least the seeds of such a misunderstanding. However... software protection is subject to separate regulation in Decree No.339 of the State Council, an English version being here. The regulations recapitulate the basics of copyright protection; software cracking is regulated under Art. 23, which says that anyone who commits any of the following acts of infringement shall, in light of the circumstances, bear civil liability by means of ceasing infringements, eliminating ill effects, making an apology, or compensating for losses:... (5)to alter or translate a piece of software without the authorization Art. 24 continues, saying that it is forbidden (3) to knowingly circumvent or sabotage technological measures used by the copyright owner for protecting the software copyright; (4) to knowingly remove or alter any electronic rights management information attached to a copy of a piece of software That covers cracking. Article 30 covers the situation of someone using pre-cracked software: A holder of copies of a piece of software that neither knows nor has reasonable grounds to know that such copies are infringing ones does not bear liability of compensation but shall cease the use of, and destroy, the infringing copies. Nevertheless, if the cease of use or the destruction of such copies is likely to cause heavy losses to him, the holder of such copies may, after paying reasonable remuneration to the software copyright owner, continue to use such copies. A mere user who is discovered simply has to stop, unless they should have known that the copy was illegal in which case they would be responsible for compensating the rights holder – I have no idea what the standards are for having reasonable grounds to know.