encode.lua youtube stream

[abc956]

Im trying to clip a certain part of a longer youtube video but it won't work. I assume its because youtube has a different stream for video and audio and it doesnt split the 2 links because other sites such as streamable work fine.
Not sure if its a limitation of the script/ffmpeg or me, is there a way to fix this because the script is flawless otherwise..
I attached the ffmpeg log, Thanks.

Im on windows and using the latest version of ffmpeg and youtube.dl.

ffmpeg-20201004-190149.log