diff --git a/youtube_dl/extractor/guitartricks.py b/youtube_dl/extractor/guitartricks.py
index 4cf191fd5..97c436102 100644
--- a/youtube_dl/extractor/guitartricks.py
+++ b/youtube_dl/extractor/guitartricks.py
@@ -7,7 +7,7 @@ from .common import InfoExtractor
 from .wistia import WistiaIE
 from ..compat import (
     compat_str,
-    compat_kwargs,
+    compat_HTTPError,
 )
 from ..utils import (
     clean_html,
@@ -23,6 +23,7 @@ class GuitarTricksIE(InfoExtractor):
     _ORIGIN_URL = 'https://www.guitartricks.com'
     _NETRC_MACHINE = 'guitartricks'
     _VALID_URL = r'https?://(?:www\.)?guitartricks\.com/(lesson|course|tutorial).php\?input=(?P<id>[A-Za-z0-9]+.*)'
+    _LOGIN_REQUIRED = False
 
     _TESTS = [{
         'url': 'https://www.guitartricks.com/lesson.php?input=21986',
@@ -48,80 +49,86 @@ class GuitarTricksIE(InfoExtractor):
         }
     }, {
         'url': 'https://www.guitartricks.com/lesson.php?input=24742',
-        'md5': '09e89ad6c6a9b85b0471b80230995fcc',
+        'md5': '98074943181f87361f16085b0370717d',
         'info_dict': {
-            'id': '5706o2esuo',
+            'id': '4h7kvsarcg',
             'ext': 'mp4',
+            'title': 'Guitar Lessons: The \'Magic L\', in Reverse!',
+            'description': "Let's flip the Magic L on it's head and open up a whole new set of options for playing in a variety of keys.\r\n\r\nThe Reverse Magic L is like the \u2018Magic L\u2019 you already learned, only it is turned upside down! \r\n\r\nThe 1 chord is played as a 5th-string power chord, and the IV and the V chords will fall into place as 6th string power chords, in an upside-down L shape. \r\n\r\nListen to how these three chords sound intuitively right together. \r\n",
+            'upload_date': '20160718',
+            'timestamp': 1468854273,
         },
     }]
 
-
-    def _download_webpage(self, *args, **kwargs):
-        kwargs.setdefault('headers', {})['User-Agent'] = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_5) AppleWebKit/603.2.4 (KHTML, like Gecko) Version/10.1.1 Safari/603.2.4'
-        return super(GuitarTricksIE, self)._download_webpage(
-            *args, **compat_kwargs(kwargs))
-
     def _real_initialize(self):
         self._login()
 
     def _login(self):
         (username, password) = self._get_login_info()
-        return
-
-        login_popup = self._download_webpage(
-            self._LOGIN_URL, None, 'Downloading login popup')
-
-        def is_logged(webpage):
-            return any(re.search(p, webpage) for p in (
-                r'<a[^>]+\bhref=["\']/logout.php',
-                r'>Logout<'))
-
-        # already logged in
-        if is_logged(login_popup):
+        if username is None:
+            if self._LOGIN_REQUIRED:
+                raise ExtractorError('No login info available, needed for using %s.' % self.IE_NAME, expected=True)
             return
 
+        def fail(message):
+            raise ExtractorError(
+                'Unable to login. GuitarTricks said: %s' % message, expected=True)
 
-        login_form = self._form_hidden_inputs(login_popup)
+        def login_step(page, urlh, note, data):
+            form = self._hidden_inputs(page)
+            form.update(data)
 
-        login_form.update({
-            'vb_login_username': username,
-            'vb_login_password': password,
-        })
+            page_url = urlh.geturl()
+            post_url = '/process/loginAjax'
+            post_url = urljoin(page_url, post_url)        
 
+            headers = {'Referer': page_url}
 
-        response = self._download_webpage(
-            self._LOGIN_URL, None, 'Logging in',
-            data=urlencode_postdata(login_form),
-            headers={
-                'Content-Type': 'application/x-www-form-urlencoded',
-                'Referer': self._ORIGIN_URL,
-                'Origin': self._ORIGIN_URL,
+            try:
+                response = self._download_json(
+                    post_url, None, note,
+                    data=urlencode_postdata(form),
+                    headers=headers)
+            except ExtractorError as e:
+                if isinstance(e.cause, compat_HTTPError) and e.cause.code == 400:
+                    response = self._parse_json(
+                        e.cause.read().decode('utf-8'), None)
+                    fail(response.get('message') or response['errors'][0])
+                raise
+
+            if response.get('status'):
+                return None, None
+            else:
+                fail(response.get('error'))
+
+            redirect_url = 'https://www.guitartricks.com/main.php'
+            return self._download_webpage_handle(
+                redirect_url, None, 'Downloading login redirect page',
+                headers=headers)
+
+        login_page, handle= self._download_webpage_handle(
+            self._LOGIN_URL, None, 'Downloading login page')
+
+        redirect_page, handle = login_step(
+            login_page, handle, 'Logging in', {
+                'login': username,
+                'password': password,
+                'action': 'verify_login',
             })
 
-
-        if not is_logged(response):
-            error = self._html_search_regex(
-                r'(?s)<div[^>]+class="form-errors[^"]*">(.+?)</div>',
-                response, 'error message', default=None)
-            if error:
-                raise ExtractorError('Unable to login: %s' % error, expected=True)
-            raise ExtractorError('Unable to log in')
+        # Successful login
+        if not redirect_page:
+            return
         
-
     def _real_extract(self, url):
         video_id = self._match_id(url)
 
         webpage = self._download_webpage(url, video_id)
 
-
         if re.search(r'Full Access Members Only', webpage):
-            self.raise_login_required('Full Access Members Only')
+            raise ExtractorError('Video only available with premium plan', expected=True)
 
         wistia_url = WistiaIE._extract_url(webpage)
-        if not wistia_url:
-            if any(re.search(p, webpage) for p in (
-                    r'Full Access Members Only')):
-                self.raise_login_required('Lecture contents locked')
 
         title = self._og_search_title(webpage, default=None)
 
@@ -132,5 +139,4 @@ class GuitarTricksIE(InfoExtractor):
             'ie_key': WistiaIE.ie_key(),
             'title': title,
             'description': self._og_search_description(webpage),
-            # TODO more properties (see youtube_dl/extractor/common.py)
         }
\ No newline at end of file