YouTube Continuation Searches

         #!/bin/sh
         # 1.sh
         # usage: 1.sh query
         # usage: 1.sh < query.yts >> query.yts
         _x2_(){ local x=$(printf '\r\n');sed "s/ *//;s/$/$x/";};
         case $# in :-)
         ;;0) # continuation search
         KEY=AIzaSyAO_FJ2SlqU8Q4STEHLGCilw_Y9_11qcW8;
         MIN=\"context\":{\"client\":{\"hl\":\"en-US\",\"gl\":\"US\",\"clientName\":\"MWEB\",\"clientVersion\":\"2.20210916.06.01\"}},\"continuation\":; 
         TOKEN=$(sed -n "s/\"token\":/$MIN/p"|sed -n \$p);
         _x2_ <<eof|nc -vvn 127.8 80|yy045|yy059   
         POST /youtubei/v1/search?key=$KEY HTTP/1.1
         Host: www.youtube.com
         Content-Length: ${#TOKEN}
         Content-Type: application/json
         Connection: close
   
         $TOKEN
   eof
         ;;*) # initial search
         S=$(echo "$@"|sed 's/ /+/g');
         _x2_ <<eof|nc -vvn 127.8 80|yy045|yy059|sed -n "/\"responseContext\":/,/\"searchSubMenu\":/w$S.yts"            
         GET /results?search_query="$S" HTTP/1.1
         Host: www.youtube.com
         Connection: close
   
   eof
         esac;

For an alternative way to search YouTube from the command line and create TSV tables of results, see, e.g.,

https://github.com/MarcoLucidi01/bin/blob/master/ytsearch

No support for continuation searches unfortunately.