For rapid merging of many files without re-encoding, you can use the command line with ffmpeg: ffmpeg -f concat -safe 0 -i filelist.txt -c copy merged.mp4 . To help you further, could you tell me:
A free desktop application for converting and editing video files into MP4 format. Download 1(1) mp4
Once you have your MP4 file(s), you can use these tools to create a feature-length video: For rapid merging of many files without re-encoding,
Go to the Network tab and select Media (or filter by ".mp4"). Download 1(1) mp4