[imgur] Fix width and height extraction (Closes #10325)

youtube_dl/extractor/imgur.py

@@ -50,12 +50,10 @@ class ImgurIE(InfoExtractor):
         webpage = self._download_webpage(
             compat_urlparse.urljoin(url, video_id), video_id)
 
-        width = int_or_none(self._search_regex(
-            r'<param name="width" value="([0-9]+)"',
-            webpage, 'width', fatal=False))
-        height = int_or_none(self._search_regex(
-            r'<param name="height" value="([0-9]+)"',
-            webpage, 'height', fatal=False))
+        width = int_or_none(self._og_search_property(
+            'video:width', webpage, default=None))
+        height = int_or_none(self._og_search_property(
+            'video:height', webpage, default=None))
 
         video_elements = self._search_regex(
             r'(?s)<div class="video-elements">(.*?)</div>',