Mac QuickTime Instructions:
- Open the first mp4 file in QuickTime
- Click Edit > Add Clip to End
- You can then select the next mp4 you’d like to merge from the file viewer.
- Click File > Export As > (select the original aspect ratio)
Windows Photos App 10 Instructions:
- Open the Photos app and click “Create”
- Select “Video Project”
- Navigate to the video files you need to combine and highlight them
- Name the project and click “Create Video”
- Click Export and Share to finish the merge.