youtube get video subtitles and cleant up the file for readability

youtube-get-sub.sh

youtube-get-subs() {
 echo "getting filenames..."
 filename=$(youtube-dl --simulate --get-title $1)-$(youtube-dl --simulate --get-id $1)
 echo "Downloading video data"
 youtube-dl --continue --write-auto-sub --sub-format vtt --sub-lang en --write-thumbnail --write-description --skip-download $1
 echo $filename 
 echo "Removing --> time stuff"
 sed -i '/-->/d' $filename.en.vtt
 echo "Removing empty lines"
 grep "\S" $filename.en.vtt > $filename.txt
 echo "Deleting old subtitle file"
 rm $filename.en.vtt
}