[fix] google video: refactor broken engine to work again

The current google_videos.py in the master branch is completely non functional, due to it not parsing the returned video search results correctly. The result is searxng saying that no results were found. This commit is a new updated google_videos.py that's designed to fix that and is confirmed to be working.

Implementing the suggestions by Bnyro.

Re-formatted with `black` for compatibility. After failing automated checks, ran the command:
black --line-length 120 --skip-string-normalization --target-version py311 google_videos.py

searx/engines/google_videos.py

@@ -10,17 +10,13 @@
 
 .. _data URLs:
    https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Data_URIs
-
 """
 from __future__ import annotations
 
-from typing import TYPE_CHECKING
-
-from urllib.parse import urlencode
+from urllib.parse import urlencode, urlparse, parse_qs
 from lxml import html
 
 from searx.utils import (
-    eval_xpath,
     eval_xpath_list,
     eval_xpath_getindex,
     extract_text,
@@ -39,11 +35,6 @@ from searx.engines.google import (
 from searx.enginelib.traits import EngineTraits
 from searx.utils import get_embeded_stream_url
 
-if TYPE_CHECKING:
-    import logging
-
-    logger: logging.Logger
-
 traits: EngineTraits
 
 # about
@@ -57,14 +48,9 @@ about = {
 }
 
 # engine dependent config
-
 categories = ['videos', 'web']
 paging = True
 max_page = 50
-"""`Google: max 50 pages`
-
-.. _Google: max 50 pages: https://github.com/searxng/searxng/issues/2982
-"""
 language_support = True
 time_range_support = True
 safesearch = True
@@ -72,7 +58,6 @@ safesearch = True
 
 def request(query, params):
     """Google-Video search request"""
-
     google_info = get_google_info(params, traits)
     start = (params['pageno'] - 1) * 10
 
@@ -85,7 +70,7 @@ def request(query, params):
             {
                 'q': query,
                 'tbm': "vid",
-                'start': 10 * params['pageno'],
+                'start': start,
                 **google_info['params'],
                 'asearch': 'arc',
                 'async': ui_async(start),
@@ -114,40 +99,66 @@ def response(resp):
     # convert the text to dom
     dom = html.fromstring(resp.text)
 
-    # parse results
-    for result in eval_xpath_list(dom, '//div[contains(@class, "g ")]'):
-
-        thumbnail = eval_xpath_getindex(result, './/img/@src', 0, None)
-        if thumbnail:
-            if thumbnail.startswith('data:image'):
-                img_id = eval_xpath_getindex(result, './/img/@id', 0, None)
-                if img_id:
-                    thumbnail = data_image_map.get(img_id)
-        else:
-            thumbnail = None
-
-        title = extract_text(eval_xpath_getindex(result, './/a/h3[1]', 0))
-        url = eval_xpath_getindex(result, './/a/h3[1]/../@href', 0)
-
-        c_node = eval_xpath_getindex(result, './/div[contains(@class, "ITZIwc")]', 0)
-        content = extract_text(c_node)
-        pub_info = extract_text(eval_xpath(result, './/div[contains(@class, "gqF9jc")]'))
+    result_divs = eval_xpath_list(dom, '//div[contains(@class, "MjjYud")]')
 
-        results.append(
-            {
-                'url': url,
-                'title': title,
-                'content': content,
-                'author': pub_info,
-                'thumbnail': thumbnail,
-                'iframe_src': get_embeded_stream_url(url),
-                'template': 'videos.html',
-            }
+    # parse results
+    for result in result_divs:
+        title = extract_text(
+            eval_xpath_getindex(result, './/h3[contains(@class, "LC20lb")]', 0, default=None), allow_none=True
+        )
+        url = eval_xpath_getindex(result, './/a[@jsname="UWckNb"]/@href', 0, default=None)
+        content = extract_text(
+            eval_xpath_getindex(result, './/div[contains(@class, "ITZIwc")]', 0, default=None), allow_none=True
+        )
+        pub_info = extract_text(
+            eval_xpath_getindex(result, './/div[contains(@class, "gqF9jc")]', 0, default=None), allow_none=True
+        )
+        # Broader XPath to find any <img> element
+        thumbnail = eval_xpath_getindex(result, './/img/@src', 0, default=None)
+        duration = extract_text(
+            eval_xpath_getindex(result, './/span[contains(@class, "k1U36b")]', 0, default=None), allow_none=True
         )
+        video_id = eval_xpath_getindex(result, './/div[@jscontroller="rTuANe"]/@data-vid', 0, default=None)
+
+        # Fallback for video_id from URL if not found via XPath
+        if not video_id and url and 'youtube.com' in url:
+            parsed_url = urlparse(url)
+            video_id = parse_qs(parsed_url.query).get('v', [None])[0]
+
+        # Handle thumbnail
+        if thumbnail and thumbnail.startswith('data:image'):
+            img_id = eval_xpath_getindex(result, './/img/@id', 0, default=None)
+            if img_id and img_id in data_image_map:
+                thumbnail = data_image_map[img_id]
+            else:
+                thumbnail = None
+        if not thumbnail and video_id:
+            thumbnail = f"https://img.youtube.com/vi/{video_id}/hqdefault.jpg"
+
+        # Handle video embed URL
+        embed_url = None
+        if video_id:
+            embed_url = get_embeded_stream_url(f"https://www.youtube.com/watch?v={video_id}")
+        elif url:
+            embed_url = get_embeded_stream_url(url)
+
+        # Only append results with valid title and url
+        if title and url:
+            results.append(
+                {
+                    'url': url,
+                    'title': title,
+                    'content': content or '',
+                    'author': pub_info,
+                    'thumbnail': thumbnail,
+                    'length': duration,
+                    'iframe_src': embed_url,
+                    'template': 'videos.html',
+                }
+            )
 
     # parse suggestion
     for suggestion in eval_xpath_list(dom, suggestion_xpath):
-        # append suggestion
         results.append({'suggestion': extract_text(suggestion)})
 
     return results