convert youtube videos into text file for free, no need to use Happy Scribe, Otter.ai, Descript, VEED.io
make sure you download ffmpeg from: https://www.gyan.dev/ffmpeg/builds/
as an example, i converted a video from Prof.Ceyhun Elgin's channel video is about Brain Drain: https://www.youtube.com/watch?v=TkbY-OXKO-Q&t=330s