/usr/local/bin/ffmpeg -i /var/www/vhosts/slidesrecorder.com/httpdocs/recordings/8/1229/2023_11_27-00_56_28-000000000008-1229-1566-dc92369f412df34a7a4908b664d6869d5cc778648ea08d4e6976ab59200b3d89/final_file.webm -filter_complex \ "[0:v]trim=duration=2[a]; \ [0:v]trim=start=6:end=12,setpts=PTS-STARTPTS[b]; \ [a][b]concat[c]; \ [0:v]trim=start=80,setpts=PTS-STARTPTS[d]; \ [c][d]concat[out1]" -map [out1]

single recording