[enh] engines: add about variable

move meta information from comment to the about variable
so the preferences, the documentation can show these information

searx/engines/bing_videos.py

@@ -1,13 +1,6 @@
+# SPDX-License-Identifier: AGPL-3.0-or-later
 """
  Bing (Videos)
-
- @website     https://www.bing.com/videos
- @provide-api yes (http://datamarket.azure.com/dataset/bing/search)
-
- @using-api   no
- @results     HTML
- @stable      no
- @parse       url, title, content, thumbnail
 """
 
 from json import loads
@@ -18,6 +11,16 @@ from searx.utils import match_language
 from searx.engines.bing import language_aliases
 from searx.engines.bing import _fetch_supported_languages, supported_languages_url  # NOQA # pylint: disable=unused-import
 
+# about
+about = {
+    "website": 'https://www.bing.com/videos',
+    "wikidata_id": 'Q4914152',
+    "official_api_documentation": 'https://www.microsoft.com/en-us/bing/apis/bing-video-search-api',
+    "use_official_api": False,
+    "require_api_key": False,
+    "results": 'HTML',
+}
+
 categories = ['videos']
 paging = True
 safesearch = True