To a first approximation, copyright law covers the rights you have to copy other people's work. There are some extremely limited exceptions based on your reaso

To a first approximation, copyright law covers the rights you have to copy other people's work. There are some extremely limited exceptions based on your reasons for copying it (things like parody, commentary, new reporting), these are very tightly defined exceptions called "fair use". There are no blanket exceptions for "non commercial" use. Keep in mind, the creation/ownership of the work gives the copyright holder unlimited authority to ban _any_ use of the work. If I write a song or make a video, I 100% have the right to say "Nobody can use this for any purpose" - then the _only_ legal uses other people can make of it are those tightly defined exceptions permitted by copyright law. "Fair use" _is_ a legal right to use copyrighted work without permission, but it's possibly one of the least understood and most violated laws in existence... And no - it does not give you any rights to "play something on a large screen in a public park"...