Youtube-editor -

Enables the addition of end screens and info cards to promote other videos or channels.

It is best used for "emergency surgery" on published content to avoid having to delete and re-upload the video. youtube-editor

For more comprehensive mobile editing, Google also offers the app, which includes additional tools like automated captions and effects. Enables the addition of end screens and info

Users can add or replace background music using a large, royalty-free audio library to avoid copyright issues. Google also offers the app

Allows users to cut out sections from the beginning, end, or middle of a video.

Access the editor through YouTube Studio by selecting 'Content' and choosing the 'Editor' option on the left menu.