Use this to download this category as MP3 with youtube-dl:
declare -a list=("https://www.youtube.com/watch?v=QbNRgOsOryE" "https://www.youtube.com/user/mrdodobird/videos" "https://www.youtube.com/channel/UCfjswDVU0XHyBN7UFG0Mi5Q" "https://www.youtube.com/user/AndrewPPrice/videos" "https://www.youtube.com/channel/UC4fyqGDhEQq_L4nzSpNMoUA" "https://www.youtube.com/user/BlenderFoundation" "https://www.youtube.com/channel/UCDdv3C21EFv7MxBMu70OExw" "https://www.youtube.com/channel/UCuNhGhbemBkdflZ1FGJ0lUQ/videos" "https://www.youtube.com/user/Blenderfan93/videos" "https://www.youtube.com/user/GlebAlexandrov/videos" "https://www.youtube.com/user/SirWadeFX/videos" "https://www.youtube.com/channel/UCy1f4m64dwCwk8CBZ_vHfPg/videos" "https://www.youtube.com/user/blengine/videos" "https://www.youtube.com/user/mediagabbitt/videos" "https://www.youtube.com/user/heaugust83/videos" "https://www.youtube.com/channel/UCojEXrCBzO-cP2N5YlRcrWw/videos" "https://www.youtube.com/channel/UCD0GTet7PkOuVH26nrfeNfA/videos" "https://www.youtube.com/channel/UCGSJevmBuDyxjLLOBNaYMGA/videos" "https://www.youtube.com/channel/UCOWrbryuVEPUMSSgayuLURg/videos" "https://www.youtube.com/channel/UCWWybvw9jnpOdJq_6wTHryA/videos" "https://www.youtube.com/channel/UCrXMyWVRmiXdMTpxxCsPuCQ/videos" "https://www.youtube.com/channel/UCzghqpGuEmk4YdVewxA79GA/videos" "https://www.youtube.com/user/FlippedNormalsTuts/videos" "https://www.youtube.com/user/MrSorbias/videos" "https://www.youtube.com/user/Xremington04/videos" "https://www.youtube.com/user/masterxeon1001/videos" "https://www.youtube.com/user/ImphenziaMusic/videos" "https://www.youtube.com/channel/UC5I9PkevsfZxvI3TGa9i2iA/videos" "https://www.youtube.com/channel/UCHihootMqyGz175gqOPahtw" "https://www.youtube.com/c/BornCG/videos" "https://www.youtube.com/channel/UCLrs8KcyJ13WQ7kO7mMCkPQ")
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
