Use this to download this category as MP3 with youtube-dl:
declare -a list=("https://www.youtube.com/channel/UCjED9uS41ioeFuPfbR-OBlw/videos" "https://www.youtube.com/user/PaulSellersWoodwork/videos" "https://www.youtube.com/channel/UCocEQojx6I6s9K_Ah2rTSlQ/videos" "https://www.youtube.com/channel/UCfqc2hpLPLj8VfgpalvEqcg/videos" "https://www.youtube.com/channel/UCZLbHFXOUTGEKuzXDwGVrZA/videos" "https://www.youtube.com/user/copaindescopeaux/videos" "https://www.youtube.com/user/Lemongrasspicker/videos" "https://www.youtube.com/user/oliverte43/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
