youtube-exists-or-not.js

var readline = require('readline');
var fs       = require('fs');
var isChannel = require('is-youtube-channel')

var rl = readline.createInterface({
  input : fs.createReadStream('/home/under/urls.txt'),
  output: process.stdout,
  terminal: false
});

rl.on('line', function(line){
  channel = line.split('/')[4];
  isChannel(channel, function(err, valid){
    if (valid) {
      fs.appendFile('valid-yt.txt', line + '\n');
    } else {
      fs.appendFile('disabled-yt.txt', line + '\n')
    }
  });
});