Loop

Looping a video or more

Your videos should have the same encoding.

Create a list of files

Create a list of files inside a normal file such as txt file with file '<filename>' syntax.

Example: Creating a list file of all the files in the current dir.

printf "file '%s'" $(ls) > list.txt

Looping one file only

Inside the list.txt would look like this:

file '100.mp4'
file '100.mp4'
file '100.mp4'
file '100.mp4'

In this case the same file is being repeated

Command

ffmpeg -f concat -i list.txt -an -c copy output.mp4

In this case the -an means do not copy the audio and the -c copy means just copy frames without reencoding them.