Stage 1.1V ?

If someone has experience in downloading youtube videos, especially only part of the video with python yt-dlp please contact me. I really appreciate any help.
I am getting close to finishing the segment downloading function, but…

I am hitting the wall. the downloading only slice of the yt video is slower than i expected. it might take up to hours if clip has to be extracted from long video. I don’t know what to do now. I am searching for some solution in official yt-dlp repository through issues and questions. Still, couldn’t find solution that would work for me. I tried direct ffmpeg,aria2c as external downloaders and maybe i will have to download full video first and only then cut clip from it… Though I find it very inefficient.