LosslessCut

// WHAT IT'S FOR

LosslessCut is an open-source app for Windows, Mac and Linux that cuts video and audio without re-encoding the file, which is why it's fast and keeps the quality. You mark where the part you want starts and ends, and it exports just that. Use it to trim the extra off a long recording from your phone, a camera or a meeting. It's free from its own site; in the Apple and Microsoft stores it's paid.