/usr/local/bin/ffmpeg -i /var/www/vhosts/slidesrecorder.com/httpdocs/recordings/8/682/2023_06_12-19_15_03-000000000008-682-1116-274fa86f2126929279bb62f36be19e0b8daabd53c794af763c021e3f4a022068/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