: If you are making a story specifically for social media, you can select multiple videos in the Instagram Story editor. You can tap Download at the top of the screen before posting to save the combined result to your camera roll. Specialized Apps
If your clips are already on your phone, you might not need an extra app: Download 938523f0c7e30e4efcbe73ae3a0b66b5 mp4
These tools allow you to upload multiple clips and download the final "story" as an MP4: : If you are making a story specifically