rename videos based on youtube-dl JSON info

rename_videos_test.sh

for f in *.json
do 
  pi=$(jq .playlist_index < "$f")
  pi=$(printf %03d $pi)
  d=$(jq -r .upload_date < "$f")
  b=$(basename "$f" .info.json)
  
  for ff in "$b"*
  do 
    mv -v "$ff" "$pi $d $ff"
  done
done