1. Trimming Video Clips in the "Photos" App 1. Tap the Photos button. 2. Find the video you want to trim and tap it to open. 3. In the upper right corner tap the arrow and hold until you see "Trim" option.4. Use the yellow sliders to exclude footage in the beginning, the end, or both.5. Tap the Trim button and Save as New Clip or trim the original video.