download video from YouTube, extract music and normalize volume

getmus.ps1

param(
    [string]$url
)

yt-dlp `
$url `
--quiet `
--extract-audio `
--audio-format mp3 `
--audio-quality 3 `
--embed-thumbnail `
--embed-metadata `
--exec 'mp3gain -q -r -c "{}"'

getmus.sh

#!/bin/bash
yt-dlp \
--quiet \
--extract-audio \
--audio-format mp3 \
--audio-quality 3 \
--embed-thumbnail \
--embed-metadata \
"$@" \
--exec 'mp3gain -q -r -c {} > /dev/null && echo {}'

Thank You, perfect. Just a couple of notations. I'm now running Ubuntu under Win 10 (Subsystem for Linux) and then I had to change from two "&&" to just one "&". It wasn't necessary under native Linux???.
I've also added a couple of lines so that the finished file is also tagged (even a Picture, only in YouTube):

#!/bin/bash
read -p ' Title : ' title
read -p 'Artist : ' artist
read -p ' Album : ' album
read -p ' Genre : ' genre
youtube-dl
"$1" \
--quiet \
--extract-audio \
--audio-format mp3 \
--audio-quality 3 \
--embed-thumbnail \
--exec 'mp3gain -q -r -c -s i {} > /dev/null & echo -n {}' \
|xargs -0 mid3v2 -t "$title" -a "$artist" -A "$album" -g "$genre"

FYI

• mp3gain is no longer available in repositories, does not compile and has been replaced with r128gain.
• ReplayGain 2.0 targets the same loudness as ReplayGain 1.0 specification, but utilizes the improved ITU BS.1770 algorithm for measuring original tracks.
• mp3gain is based on ReplayGain 1.0 specification.

Improved script: https://gist.github.com/madjoe/b981fa7f3f81089a37257e366c1ef581