Use this to download this category as MP3 with youtube-dl:
declare -a list=("https://www.youtube.com/user/petermckinnon24/videos" "https://www.youtube.com/user/Airbuse2" "https://www.youtube.com/user/AuCoinDuJour" "https://www.youtube.com/user/ouiouiphoto/featured" "https://www.youtube.com/channel/UC4KSCk_ah54uGTDWcK4bK8A/videos" "https://www.youtube.com/channel/UCH1RSy2yH1lX0OTR6ht5rdg/videos" "https://www.youtube.com/c/tutoriels/videos")
for val in ${list[@]}; do
name=$(basename "$val")
if [ -e $name ]
then
continue
fi
mkdir $name
cd $name
youtube-dl -f mp3-128 $val
cd ..
done
