Can I edit slow-motion videos directly on the iPhone 15 Pro

1. Open the Photos app and select the slow-motion video you want to edit [3].

2. Tap the "Edit" button at the bottom of the video [3].

3. You can then drag the white vertical bars beneath the frame viewer to adjust the portion of the video that is played in slow motion [3]. This allows you to control where the slow-motion effect is applied.

4. Once you've made your edits, tap "Done" to save the changes [3]. You can choose to either "Save Video" to overwrite the original, or "Save Video as New Clip" to keep both versions.

So in summary, the iPhone 15 Pro does provide built-in tools to trim the length of slow-motion videos and adjust the slow-motion section directly on the device, without needing to use a separate video editing app. This gives you the ability to fine-tune your slow-motion footage right on your iPhone.