Concat compatible video files using ffmpeg (in this case mp4)

concat.sh

#!/bin/sh
rm -rf .list.txt

for file in *; do
  filename=$(basename -- "$file")
  basename="${filename%.*}"
  extension="${filename##*.}"

  echo "file '$file'" >> .list.txt;
done

cat .list.txt && ffmpeg \
  -f concat \
  -safe 0 \
  -i .list.txt \
  -threads 0 \
  -c:v copy \
  -c:a copy \
  -scodec copy \
  "${basename}-concat.${extension}"