The number of video files (mov) makes up a video file

First define a text file files_to_combine:

file ./first_file.MOV
file ./second_file.MOV

The combined generation mp4:

ffmpeg -safe 0 -f concat -i files_to_combine -vcodec copy -acodec aac -strict -2 -b:a 384k merged.mp4

The combined generation mov:

ffmpeg -safe 0 -f concat -i files_to_combine -vcodec copy -acodec copy merged.MOV

https://superuser.com/a/1256224