diff --git a/config.default.toml b/config.default.toml
index 79cfb78..14b0bde 100644
--- a/config.default.toml
+++ b/config.default.toml
@@ -8,6 +8,10 @@ is_proxied = false
 api_key = ""
 api_key_admin = ""
 
+[extractor]
+user-agent = "" # leave empty for default
+cookies_path = "" # leave empty for none
+
 [admin]
 # List of users with admin priviledges.
 admins = ["admin"]
diff --git a/ythdd_api_v1.py b/ythdd_api_v1.py
index 4ab5992..62ab976 100644
--- a/ythdd_api_v1.py
+++ b/ythdd_api_v1.py
@@ -66,23 +66,23 @@ def hot(data):
 				getcomments = False
 
 			try:
-				started = int(time.time())
+				started = time.time()
 				extracted_dict = ythdd_extractor.extract(url_lookup[data[1]] + videoId, getcomments=getcomments, maxcomments=comment_count)
-				extracted_dict["took"] = int(time.time()) - started
+				extracted_dict["took"] = time.time() - started
 				return 200, "OK", extracted_dict
 			except Exception as e:
 				incrementBadRequests()
-				return 400, f'error: failed to get "{videoId}" ({data[2]}). {e}', []
+				return 400, f'error: failed to get "{videoId}" ({data[2]})', {'error_msg': str(e)}
 		case "related":
 			videoId = data[2]
 			if len(videoId) != 11: # videoId sanity check
 				incrementBadRequests()
 				return 400, f'error: bad request. wrong videoId: {videoId} is {len(videoId)} characters long, but should be 11.', []
 
-			started = int(time.time())
+			started = time.time()
 			try:
 				extracted_related = ythdd_extractor.related('https://www.youtube.com/watch?v=' + videoId)
-				extracted_related['took'] = int(time.time()) - started
+				extracted_related['took'] = time.time() - started
 				return 200, "OK", extracted_related
 			except Exception as e:
 				incrementBadRequests()
diff --git a/ythdd_extractor.py b/ythdd_extractor.py
index 7ad2ed9..642ddae 100644
--- a/ythdd_extractor.py
+++ b/ythdd_extractor.py
@@ -16,6 +16,14 @@ ytdl_opts = {
 }
 
 def extract(url: str, getcomments=False, maxcomments=""):
+	# TODO: check user-agent and cookiefile
+
+	if ythdd_globals.config['extractor']['user-agent']:
+		yt_dlp.utils.std_headers['User-Agent'] = ythdd_globals.config['extractor']['user-agent']
+
+	if ythdd_globals.config['extractor']['cookies_path']:
+		ytdl_opts['cookiefile'] = ythdd_globals.config['extractor']['cookies_path']
+
 	if len(url) == 11:
 		url = "https://www.youtube.com/watch?v=" + url
 	if getcomments:
@@ -37,7 +45,10 @@ def related(url: str):
 		videoId = url[32:44]
 		params = {'v': videoId}
 
-	user_agent = 'Mozilla/5.0 (Windows NT 10.0; rv:130.0) Gecko/20100101 Firefox/130.0'
+	# NOTE: use ESR user-agent
+	# user_agent = 'Mozilla/5.0 (Windows NT 10.0; rv:130.0) Gecko/20100101 Firefox/130.0'
+	user_agent = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:128.0) Gecko/20100101 Firefox/128.0'
+
 	if ythdd_globals.config['extractor']['user-agent']:
 		user_agent = ythdd_globals.config['extractor']['user-agent']