Call to undefined function wp_read_video_metadata() in /var/www/vhosts/gdfiles

FULL ERROR:
Fatal error: Call to undefined function wp_read_video_metadata() in /var/www/vhosts/gdfiles.net/hvac-hacks/wp-admin/includes/image.php on line 122
Using my own theme (is based off wp 2012) – When users upload at https://www.hvac-hacks.com/share a video I get this error right at the POST.

If it has something to do with my theme, here is the form I made:

//Custom hvac hacks form
function hvac_hacks_post_share() {
	$current_user = wp_get_current_user();
	if (debugMode) fb($current_user);
	if (isset($_POST['submit_hvac_hacks_post'])) {
		header( 'Location:/');
		exit();
	} else {

		if ( 0 == $current_user->ID ) {
			return '<h1>You must be logged in to submit a post.</h1>';
		} else {
			return '
			<div id="hvac-hacks-post-loader" style="display:none;">
			<h1 style="text-align:center">Uploading your post...<br/>Please do not close your browser until we are finished...<br/></h1>
			<img class="aligncenter" src ="/img/486.gif"/>

			</div>
			<div id="hvac-hacks-post">
				<form action="" method="post" enctype="multipart/form-data" name="hvachacks-post-form">
					<fieldset>
						<legend>Share Post</legend>
						<input type="hidden" name ="hvac-hacks-post-user-id" id = "hvac-hacks-post-user-id" value="'.$current_user->ID.'">
						<input type="hidden" name ="hvac-hacks-post-displayname" id = "hvac-hacks-post-displayname" value="'.$current_user->display_name.'">
						<input type="reset" id="hvac-hacks-post-clear" style="display:none;">
						<div class="hvac-hacks-post-category-wrap">
							<label for = "hvac-hacks-post-category">Categories:</label>
							<p><input type = "checkbox" name = "hvac_hacks_post_category[]" value="84">Blash from the Past</p>
							<p><input type = "checkbox" name = "hvac_hacks_post_category[]" value="103">Condensate Nightmare Contest</p>
							<p><input type = "checkbox" name = "hvac_hacks_post_category[]" value="82">Helpful Guides and diagrams</p>
							<p><input type = "checkbox" name = "hvac_hacks_post_category[]" value="4" checked>HVAC Hacks</p>
							<p><input type = "checkbox" name = "hvac_hacks_post_category[]" value="81">Memes</p>
							<p><input type = "checkbox" name = "hvac_hacks_post_category[]" value="87">New Install</p>
							<p><input type = "checkbox" name = "hvac_hacks_post_category[]" value="104">Questions</p>
							<p><input type = "checkbox" name = "hvac_hacks_post_category[]" value="99">Videos</p>

						</div>
						<div class="hvac-hacks-post-title-wrap">
							<label for = "hvac-hacks-post-title">Title / Caption</label>
							<input type = "text" id = "hvac-hacks-post-title" name = "hvac-hacks-post-title">
						</div>
						<div class="hvac-hacks-post-content-wrap">
							<label for = "hvac-hacks-post-content">Description / Question</label>
							<input type = "text" id = "hvac-hacks-post-content" name = "hvac-hacks-post-content">
						</div>
						<div class="hvac-hacks-post-file-wrap">
							<label for="hvac-hacks-post-file">Choose File</label>
							<input type="file" name = "hvac-hacks-post-file" id="hvac-hacks-post-file">
						</div>
						<div class="hvac-hacks-post-submit-wrap">
							<input type="submit" name="submit_hvac_hacks_post" value="Upload Post">
						</div>
					</fieldset>
				</form>
			</div>

				';
			}
		}
}

add_shortcode('hvac_hacks_share','hvac_hacks_post_share');

Now here is the POST method of the form (which results in an error)

function submit_hvac_hacks_post(){
	if (isset($_POST['submit_hvac_hacks_post'])) {
		$isVideo=false;
		$username = sanitize_user($_POST['hvac-hacks-post-displayname']);
		$categories = $_POST['hvac_hacks_post_category'];
		$title = sanitize_text_field($_POST['hvac-hacks-post-title']);
		$content = sanitize_text_field($_POST['hvac-hacks-post-content']);
		$file_tmp = $_FILES['hvac-hacks-post-file']['tmp_name'];
		$upload_dir = wp_upload_dir();
		$singleName = generateRandomString(21);
		$newName = $upload_dir[path].'/hvac-hacks.com-'.$singleName;
		if (debugMode) fb('Post Array: '.$_POST);
		if (debugMode) fb('File Array: '.$_FILES);
		if (debugMode) fb('Categories: '.$categories);
		move_uploaded_file($file_tmp,$newName);
		$image_types = array( 'jpg', 'gif', 'png', 'jpeg', 'bmp' );
		$video_types = array( 'avi', 'mov', 'mpg', 'mp4', 'wmv','flv','mpeg' );
		$user_file_array = explode(".", $_FILES['hvac-hacks-post-file']['name']);
		$ext = array_pop($user_file_array);
		$ext = strtolower( $ext );
		if ($_FILES["file"]["error"] > 0)
		  {
		  echo "Error: " . $_FILES["file"]["error"] . "<br>";
		  }
		if ( in_array( $ext, $image_types ) ) {
			exec('convert -auto-orient -verbose -format jpg '.$newName.' '.$newName.'.jpg');
			exec('rm '.$newName);
			if (debugMode) fb('temp file: '.$file_tmp);
			if (debugMode) fb('new file: '.$newName);
		}
		$filename= $newName.'.'.'jpg';
		if ( in_array( $ext, $video_types ) ) {
			if (!in_array ($categories, "99")) {
				array_push($categories,"99");
			}
			$filename= $newName.'.'.$ext;
			$isVideo=true;
		}
		if(!isset($_FILES['hvac-hacks-post-file']) && $_FILES['hvac-hacks-post-file']['size'] > 0){
			$filename = "/img/post.png";
		}
		$newPost = array(
		  'comment_status' => 'open', // 'closed' means no comments.
		  'ping_status'    => 'closed', // 'closed' means pingbacks or trackbacks turned off
		  'post_author'    => $_POST['hvac-hacks-post-user-id'],  //The user ID number of the author.
		  'post_category'  => $categories,  //post_category no longer exists, try wp_set_post_terms() for setting a post's categories
		  'post_content'   => $content,  //The full text of the post.
		  'post_status'    => 'publish',  //Set the status of the new post.
		  'post_title'     => $title,  //The title of your post.
		  'post_type'      => 'post',  //You may want to insert a regular post, page, link, a menu item or some custom post type
		  'tags_input'     => 'hvachacks' //For tags.
		);
		$new_post_id = wp_insert_post( $newPost, $wp_error );
		if (debugMode) fb('New Post ['.$new_post_id.'] Created');
		if (debugMode) fb($newPost);
		  $wp_filetype = wp_check_filetype(basename($filename), null );
		  $wp_upload_dir = wp_upload_dir();
		  $attachment = array(
		     'guid' => $wp_upload_dir['url'] . '/' . basename( $filename ),
		     'post_mime_type' => $wp_filetype['type'],
		     'post_title' => preg_replace('/\.[^.]+$/', '', basename($filename)),
		     'post_content' => '',
		     'post_status' => 'inherit'
		  );
		  if (debugMode) fb('File attachment: '.$attachment);
		  if (debugMode) fb('guid: '.$attachment['guid']);
		  if (debugMode) fb('Mime Type: '.$attachment['post_mime_type']);
		  if (debugMode) fb('Title: '.$attachment['post_title']);
		  $attach_id = wp_insert_attachment( $attachment, $filename, $new_post_id  );
		  // you must first include the image.php file
		  // for the function wp_generate_attachment_metadata() to work
		  require_once(ABSPATH . 'wp-admin/includes/image.php');
		  $attach_data = wp_generate_attachment_metadata( $attach_id, $filename );
		  wp_update_attachment_metadata( $attach_id, $attach_data );
		  set_post_thumbnail($new_post_id,$attach_id);
		  if ($isVideo) {
			 add_post_meta( $new_post_id, 'video_url', $upload_dir['url'].'/hvac-hacks.com-'.$singleName.'.'.$ext, true );
			if (debugMode) fb($new_post_id, 'video_url', $upload_dir['url'].'/hvac-hacks.com-'.$singleName.'.'.$ext);
		  }

	}

}
add_action('init','submit_hvac_hacks_post');

Images work fine just as planned. How do I fix this????? Please help!

https://www.ads-software.com/plugins/featured-video-plus/