/usr/local/bin/ffmpeg -i /var/www/vhosts/slidesrecorder.com/httpdocs/recordings/8/418/2023_04_13-08_20_20-000000000008-418-529-476320caff29e1be849e01130c33bd2690f680ee8353a5928194adbd1c6990b5/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