Nesting items is a simple and effective way to alter clips on a large scale, or move them around as a group. When doing larger projects it is often best to use separate “chapters” where you work on different sequences separately, then put them into a final sequence when you are done. From there you can put video and audio transitions between the nested sequences just like you could do with single video clips. This is an important feature of Final Cut Pro and will allow you to stay organized and make edits that affect larger segments of your final project.