diff --git a/app.py b/app.py
index d202673..3d92c31 100644
--- a/app.py
+++ b/app.py
@@ -173,6 +173,12 @@ def allow_download(params):
         return False
     return True
 
+def get_video_resolution(params):
+    if not params:
+        return None, None
+    video = params['media']['domand']['videos'][0]
+    return video['width'], video['height']
+
 def get_video_quality(params, quality_level_threshold=3):
     """Get the code of the best video quality available (optionally below a certain threshold)"""
     videos = params['media']['domand']['videos']
@@ -275,6 +281,7 @@ def proxy(video_id):
         params["video"]["thumbnail"].get("middleUrl") or
         params["video"]["thumbnail"].get("url")
     ) if params else None
+    video_width, video_height = get_video_resolution(params) if params else (None, None)
 
     download_allowed = allow_download(params) if params else False
     video_quality = get_video_quality(params) if params else None
@@ -291,8 +298,6 @@ def proxy(video_id):
 
     cdn_video_url = get_cdn_url(video_id)
     og_tags = soup.find_all("meta", property=lambda x: x)
-    og_video_width = None
-    og_video_height = None
     for tag in og_tags:
         if 'data-server' in tag.attrs:
             del tag.attrs['data-server']
@@ -302,21 +307,16 @@ def proxy(video_id):
         # Fix video URL
         if tag.get("property") == "og:video:url" or tag.get("property") == "og:video:secure_url":
             tag["content"] = cdn_video_url
-        # Set vars
-        if tag.get("property") == "og:video:width":
-            og_video_width = tag.get("content")
-        if tag.get("property") == "og:video:height":
-            og_video_height = tag.get("content")
 
     og_tags_str = "\n".join(str(tag) for tag in og_tags if tag.get("property") not in ["og:site_name"])
     og_tags_str += '\n<meta content="0" property="twitter:image"/>'
     og_tags_str += '\n<meta content="player" property="twitter:card"/>'
     og_tags_str += '\n<meta content="video/mp4" property="twitter:player:stream:content_type"/>'
     og_tags_str += f'\n<meta content="{cdn_video_url}" property="twitter:player:stream"/>'
-    if og_video_width:
-        og_tags_str += f'\n<meta content="{og_video_width}" property="twitter:player:width"/>'
-    if og_video_height:
-        og_tags_str += f'\n<meta content="{og_video_height}" property="twitter:player:height"/>'
+    if video_width:
+        og_tags_str += f'\n<meta content="{video_width}" property="twitter:player:width"/>'
+    if video_height:
+        og_tags_str += f'\n<meta content="{video_height}" property="twitter:player:height"/>'
     og_tags_str += '\n<meta content="ニコニコ動画" property="og:site_name"/>'
     og_tags_str += f'\n<link rel="alternate" href="{get_oembed_url(params)}" type="application/json+oembed" title="{video_id}"/>'
     html_response = f"""<!DOCTYPE html>