How do I save a trimmed slow-motion video as a new clip on the iPhone 15 Pro

1. Open the Photos app and select the slow-motion video you want to edit.

2. Tap the "Edit" button at the top right.

3. In the video editor, use the white vertical bars beneath the frame viewer to trim the video and adjust the slow-motion section as desired.

4. Once you've made your edits, tap the "Done" button.

5. Instead of just tapping "Save Video" to overwrite the original, tap "Save Video as New Clip".

This will create a new video file with your trimmed and edited slow-motion footage, while preserving the original unedited version as well. The new clip will be saved to your Photos library as a separate video.

By choosing the "Save Video as New Clip" option, you can experiment with different slow-motion edits without permanently altering the original recording. This allows you to keep multiple versions and choose the one you like best.

So in summary, the key steps are: Edit the slow-motion video, then select "Save Video as New Clip" when finished to create a new file with your custom edits, leaving the original untouched.