Ajax call - Append the structure of the php echo - php

Question

I am confused a little bit and I have no clues what am I looking for.
Although I will post here important parts so you may figureout and help me.
A part of PHP file:
if (empty($vid) || empty($entry)) {
$broken = TRUE;
}
if(!$broken) {
$video = parseVideoEntry($entry);
echo "
<div class=\"video_wrap\">
<div class=\"video_thumbnail\">
<a href=\"{$video->watchURL}\">
<img src=\"$video->thumbnailURL\">
</a>
</div>
</div>
<!-- More of structure parts here -->
";
}
A part of HTML structure:
<form action="" method="GET" style="margin: 5% 0;" id="youtube_fetch">
<input type="text" name="id" value="https://www.youtube.com/watch?v=VIDEO_ID_HERE" id="videoID_input" />
<input type="submit" id="fetch_submit" />
</form>
A part of jQuery / Ajax call:
$('#fetch_submit').on('click', function (e) {
var videoID = $('#videoID_input').val();
$.ajax({
url: 'inc/YouTube_API_Fetch_ID.php',
type: 'GET',
data: { id: videoID },
success: function (state) {
var newState = $.trim(state);
if (newState == '')
alert('Return an Error later!');
else
console.log(state);
}
});
e.preventDefault();
});
Ok so when I put valid youtube ID into the input field, it will return the else from ajax call (echo the html structure in console log).
The part that I don't know how to deal with is: "How to get that echoed HTML content/structure and append it into the <div id="youtube_content"></div> for example or directly to the body.

Answer 1

Use the .html() method:
$('#youtube_content').html(state);
References:
.html() - jQuery API Documentation

Answer 2

If I understand your question correctly:
$('#fetch_submit').on('click', function (e) {
var videoID = $('#videoID_input').val();
$.ajax({
url: 'inc/YouTube_API_Fetch_ID.php',
type: 'GET',
data: { id: videoID },
success: function (state) {
var newState = $.trim(state);
if (newState == '')
alert('Return an Error later!');
else {
$('<div />', {
id: 'youtube_content'
}).appendTo('body');
$('#youtube_content').html(state);
}
}
});
e.preventDefault();
});