Merge Files with FFmpeg

Write your files list into file_list.txt

file /mnt/d/Videos/video_part1.mp4
file /mnt/d/Videos/video_part2.mp4
file /mnt/d/Videos/video_part3.mp4

Call following command in bash.

ffmpeg -safe 0 -f concat -i file_list.txt -c copy video_merged.mp4