youtubetest.sh

 #!/bin/bash

 videos=$(grep -cve '^\s*$' input.txt)
 echo "Total of $videos videos"
 i=1
 while read video; do
     if [[ $(curl -s http://www.youtube.com/oembed\?url\=https://www.youtube.com/watch\?v\=$(echo $video)\&format\=json) = "Not Found" ]]; then
         echo "$i: $video is bad"
         echo "$video" >> bad.txt
     else
         echo "$i: $video is good"
         echo "$video" >> good.txt
     fi
     ((i++))
 done < input.txt

Draai met bash youtubetest.sh , met input.txt ernaast