FFMPEG playlist

ffmpeg
Create file playlist.txt 
file '/path/to/video/video.mp4'
file '/path/to/video/video.mp4'
file '/path/to/video/video.mp4'
file '/path/to/video/video.mp4'
file '/path/to/video/video.mp4'
Run ffmpeg 
ffmpeg -f concat -i playlist.txt -c copy output.mp4