yt-dlp instructions

https://github.com/yt-dlp/yt-dlp

# Formats
yt-dlp -F "https://www.youtube.com/watch?v=DIBw9dSVKdU"

# Easiest grab
yt-dlp -f bestvideo+bestaudio "https://www.youtube.com/watch?v=DIBw9dSVKdU"

or

# Stick with mp4/m4a
yt-dlp -f 'bestvideo[ext=mp4]+bestaudio[ext=m4a]/bestvideo+bestaudio' --merge-output-format mp4 "https://www.youtube.com/watch?v=DIBw9dSVKdU"

# Best m4a
yt-dlp -f 'bestaudio[ext=m4a]' -x "https://www.youtube.com/watch?v=II_5jBaYmGQ"

-x = extract audio

Partial Clips

https://www.reddit.com/r/youtubedl/wiki/howdoidownloadpartsofavideo/

yt-dlp -f "(bestvideo[ext=mp4]+bestaudio[ext=m4a]/bestvideo+bestaudio)[protocol\!*=dash]" --external-downloader ffmpeg --external-downloader-args "ffmpeg_i:-ss 00:00:00.00 -t 00:00:8.00" "https://www.youtube.com/watch?v=SCo2RMpiZx8"