. Open a "New Video Project," add your files to the project library, drag them onto the timeline in your preferred order, and click "Finish video" or "Save" to export as a single MP4. : Open the first file in QuickTime Player . Navigate to Edit > Add Clip to End , select your next file, and repeat as needed. Use File > Export As to save the merged result. 2. Advanced Free Software (No Re-encoding)
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: You can upload MP4 files via the browser or through a REST API for automation. filedot mp4