+        # The following extraction logic is proposed by @Belderak and @gdkchan
+        # and declared to be used freely in youtube-dl
+        # See https://github.com/rg3/youtube-dl/issues/9706
+
+        numbers_js = self._download_webpage(
+            'https://openload.co/assets/js/obfuscator/n.js', video_id,
+            note='Downloading signature numbers')
+        signums = self._search_regex(
+            r'window\.signatureNumbers\s*=\s*[\'"](?P<data>[a-z]+)[\'"]',
+            numbers_js, 'signature numbers', group='data')
+
+        linkimg_uri = self._search_regex(
+            r'<img[^>]+id="linkimg"[^>]+src="([^"]+)"', webpage, 'link image')
+        linkimg = self._request_webpage(
+            linkimg_uri, video_id, note=False).read()
+
+        width, height, pixels = decode_png(linkimg)
+
+        output = ''
+        for y in range(height):
+            for x in range(width):
+                r, g, b = pixels[y][3 * x:3 * x + 3]
+                if r == 0 and g == 0 and b == 0:
+                    break
+                else:
+                    output += compat_chr(r)
+                    output += compat_chr(g)
+                    output += compat_chr(b)
+
+        img_str_length = len(output) // 200
+        img_str = [[0 for x in range(img_str_length)] for y in range(10)]
+
+        sig_str_length = len(signums) // 260
+        sig_str = [[0 for x in range(sig_str_length)] for y in range(10)]
+
+        for i in range(10):
+            for j in range(img_str_length):
+                begin = i * img_str_length * 20 + j * 20
+                img_str[i][j] = output[begin:begin + 20]
+            for j in range(sig_str_length):
+                begin = i * sig_str_length * 26 + j * 26
+                sig_str[i][j] = signums[begin:begin + 26]
+
+        parts = []
+        # TODO: find better names for str_, chr_ and sum_
+        str_ = ''
+        for i in [2, 3, 5, 7]:
+            str_ = ''
+            sum_ = float(99)
+            for j in range(len(sig_str[i])):
+                for chr_idx in range(len(img_str[i][j])):
+                    if sum_ > float(122):
+                        sum_ = float(98)
+                    chr_ = compat_chr(int(math.floor(sum_)))
+                    if sig_str[i][j][chr_idx] == chr_ and j >= len(str_):
+                        sum_ += float(2.5)
+                        str_ += img_str[i][j][chr_idx]
+            parts.append(str_.replace(',', ''))
+
+        video_url = 'https://openload.co/stream/%s~%s~%s~%s' % (parts[3], parts[1], parts[2], parts[0])