/usr/local/bin/ffmpeg -i /var/www/vhosts/slidesrecorder.com/httpdocs/recordings/8/546/2023_06_14-08_01_11-000000000008-546-1138-460955369a58c24948df8f53e4135d83cf290ecd02c27d430a8668d1bdad2756/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