You have downloaded with yt-dlp a music lesson video.
But you would like to change its pitch.
With #linux command line tools:
1. Extract the audio from a webm file:
ffmpeg -i snuff_c_sharp.webm snuff_c_sharp.wav
2. Transpose (--pitch 3 means "raise pitch by 3 semitones"):
rubberband --pitch 3 snuff_c_sharp.wav snuff_e.wav
3. Put the transposed audio back into the video file:
ffmpeg -i snuff_c_sharp.webm -i snuff_e.wav -c:v copy -map 0✌️0 -map 1🅰0 snuff_e.mp4