1. Shoot your video in TikTok, then after stopping the recording, tap the red checkmark icon.
2. Tap the word and icon for "Adjust clips" near the top-right of the screen.
3. A bar will appear at the bottom of the screen, containing your clip. Use the red sliders on either side to change the start and end time of the clip, then tap "Save" in the top-right.
4. Tap "Next," then select your posting options and hit "Post" or "Drafts" to save the file.