1. Create a file named FileList.txt with the content:

file 

Remark
The answer is based on:

• StackOverflow - How to Concatenate Two MP4 Files Using FFMPEG.
• Handling PCM Stream in MP4 File in FFMPEG.

1. Create a file named FileList.txt with the content:

file full/path/to/Video001.mp4
file full/path/to/Video002.mp4
file full/path/to/Video003.mp4
.
.
.
file full/path/to/Video030.mp4

One could use the full path instead
2. Run ffmpeg -f concat -safe 0 -i FileList.txt -c copy MergedFile.mp4.
3. In case of the error Could not find tag for codec pcm_alaw in stream #1 or something related to PCM audio, know that FFMPEG can't generate an MP4 file with PCM audio. Hence chose another container: ffmpeg -f concat -safe 0 -i FileList.txt -c copy MergedFile.mkv or encode the audio: ffmpeg -f concat -safe 0 -i FileList.txt -c:v copy -c:a aac MergedFile.mkv.

Remark
The answer is based on:

• StackOverflow - How to Concatenate Two MP4 Files Using FFMPEG.
• Handling PCM Stream in MP4 File in FFMPEG.