ffmpeg

ffmpeg is a free and open-source suite consisting of
many audio and video tools and libraries.

Concatenate multiple video files with matching audio-tracks

First you need to create a text file files.txt that includes a line for every
video you want to concatenate in the form of:

file '<path to the video>'

Make sure the videos are in correct order.
To concatenate these video files you can run:

ffmpeg -f concat -safe 0 -i files.txt -map 0 -c copy output.mp4