-czechfantasy- Czech Fantasy 3 -parts 1- 2- 3- ... Direct

ffmpeg -i "part1.mp4" -i "part2.mp4" -i "part3.mp4" -filter_complex "[0:v][0:a][1:v][1:a][2:v][2:a]concat=n=3:v=1:a=1" -c:v libx264 -c:a aac czech_fantasy_3_full.mp4

From a production standpoint, Czech Fantasy 3 doubled the budget of its predecessors. The decision to shoot in 4K HDR (uncommon for the genre at the time) and hire a narrative script doctor paid off in critical acclaim from niche review aggregators, though mainstream awards largely ignored it due to its unconventional structure. -CzechFantasy- Czech Fantasy 3 -Parts 1- 2- 3- ...

Many adult video scripts support "Playlist" or "Series" plugins. You would: ffmpeg -i "part1