Cover, whether there is a video with the same cover, it is best to take a screenshot yourself, and you can't directly use the downloaded cover;
Whether the content and video sources are downloaded or not, if they are edited by themselves, there is no such problem.
The title and trailer, whether the title and trailer files are similar to other videos, or whether the title and trailer are automatically added by using love editing may lead to copyright problems.
Background music, is it copyrighted?