Convert URL into embeds

convert_url.js

function convert_youtube(input) {
  var pattern = /(?:http?s?:\/\/)?(?:www\.)?(?:youtube\.com|youtu\.be)\/(?:watch\?v=)?(\S+)/g;
  if (pattern.test(input)) {
    var replacement = '<iframe width="420" height="345" src="http://www.youtube.com/embed/$1" frameborder="0" allowfullscreen></iframe>';
    var input = input.replace(pattern, replacement);
    // For start time, turn get param & into ?
    var input = input.replace('&amp;t=', '?t=');
  }
  return input;
}

function convert_vimeo(input) {
  var pattern = /(?:http?s?:\/\/)?(?:www\.)?(?:vimeo\.com)\/?(\S+)/g;
  if (pattern.test(input)) {
   var replacement = '<iframe width="420" height="345" src="//player.vimeo.com/video/$1" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>';
   var input = input.replace(pattern, replacement);
  }
  return input;
}

function convert_twitch(input) {
  var pattern = /(?:http?s?:\/\/)?(?:www\.)?(?:twitch\.tv)\/?(\S+)/g;
  if (pattern.test(input)) {
   var replacement = '<iframe src="https://player.twitch.tv/?channel=$1&!autoplay" frameborder="0" allowfullscreen="true" scrolling="no" height="378" width="620"></iframe>';
   var input = input.replace(pattern, replacement);
  }
  return input;
}

function convert_vocaroo(input) {
  var pattern = /(?:http?s?:\/\/)?(?:www\.)?(?:vocaroo\.com\/i)\/?(\S+)/g;
  if (pattern.test(input)) {
   var replacement = '<object width="148" height="44"><param name="movie" value="http://vocaroo.com/player.swf?playMediaID=$1&autoplay=0"></param><param name="wmode" value="transparent"></param><embed src="http://vocaroo.com/player.swf?playMediaID=$1&autoplay=0" width="148" height="44" wmode="transparent" type="application/x-shockwave-flash"></embed></object>';
   var input = input.replace(pattern, replacement);
  }
  return input;
}

function convert_video_url(input) {
  var pattern = /([-a-zA-Z0-9@:%_\+.~#?&//=]{2,256}\.[a-z]{2,4}\b(\/[-a-zA-Z0-9@:%_\+.~#?&//=]*)?(?:webm|mp4|ogv))/gi;
  if (pattern.test(input)) {
    var replacement = '<video controls="" loop="" controls src="$1" style="max-width: 960px; max-height: 676px;"></video>';
    var input = input.replace(pattern, replacement);
  }
  return input;
}

function convert_image_url(input) {
  var pattern = /([-a-zA-Z0-9@:%_\+.~#?&//=]{2,256}\.[a-z]{2,4}\b(\/[-a-zA-Z0-9@:%_\+.~#?&//=]*)?(?:jpg|jpeg|gif|png))/gi;
  if (pattern.test(input)) {
    var replacement = '<a href="$1" target="_blank"><img class="sml" src="$1" /></a><br />';
    var input = input.replace(pattern, replacement);
  }
  return input;
}

// Run this convert last
function convert_general_url(input) {
  // Ignore " to not conflict with other converts
  var pattern = /(?!.*")([-a-zA-Z0-9@:%_\+.~#?&//=;]{2,256}\.[a-z]{2,4}\b(\/[-a-zA-Z0-9@:%_\+.~#?&//=;]*))/gi;
  if (pattern.test(input)) {
    var replacement = '<a href="$1" target="_blank">$1</a>';
    var input = input.replace(pattern, replacement);
  }
  return input;
}