I'm planning to create a YouTube channel, posting modern, avant garde, post modernism, impressionalism music as a visualiser video, but I found that most of it are copyrighted and It takes more time to be legalized as a public domain project. Is it legal to do that? Now I'm planning to do Stenhammer Piano Sonatas first and has many files but I hesitate to do so because most of them are copyrighted. Are Stenhammer still at copyright?
If anyone has any advices, please respond me