Bash Rumble downloader

rumble-dl() {
 [ -n "$1" ] && for s in $*
  do url=`wget -O- $s | sed -n -E 's/^.*embedUrl...([^"]+).*$/\1/p'`
  if [ -n "$url" ]
   then htmlpage=${s##*/}
   basename=${htmlpage%.*}
   echo htmlpage\=$htmlpage basename\=$basename
   indirectID=${basename%%-*}
   directID=`youtube-dl --get-id $url`
   echo indirectID\=$indirectID directID\=$directID
   [ -f "$directID.mp4" ] && rm $directID.mp4 && rm ${directID}.mp4
   [ -f "${basename}_${directID}.mp4" ] && mv ${basename}_${directID}.mp4 ${basename}_${directID}.mp4.bak
   youtube-dl --merge-output-format mp4 --recode-video mp4 --id $url
   [ -s "${directID}.mp4" ] && mv ${directID}.mp4 ${basename}_${directID}.mp4
   [ -s "${basename}_${directID}.mp4" ] && [ -f "${basename}_${directID}.mp4.bak" ] && rm ${basename}_${directID}.mp4.bak
   [ -s "${basename}_${directID}.mp4.bak" ] && mv ${basename}_${directID}.mp4.bak ${basename}_${directID}.mp4
  fi
 done
}