diff --git a/reolink_api/rtsp_client.py b/reolink_api/rtsp_client.py
index 75e16bb..6213ad4 100644
--- a/reolink_api/rtsp_client.py
+++ b/reolink_api/rtsp_client.py
@@ -37,10 +37,7 @@ class RtspClient:
         self.port = port
         self.proxy = kwargs.get("proxies")
         self.url = f'rtsp://{self.username}:{self.password}@{self.ip}:{self.port}//h264Preview_01_{profile}'
-        if use_udp:
-            capture_options = capture_options + 'udp'
-        else:
-            capture_options = capture_options + 'tcp'
+        capture_options += 'udp' if use_udp else 'tcp'
 
         os.environ["OPENCV_FFMPEG_CAPTURE_OPTIONS"] = capture_options
 
@@ -90,9 +87,6 @@ class RtspClient:
         """
         Opens OpenCV Video stream and returns the result according to the OpenCV documentation
         https://docs.opencv.org/3.4/d8/dfe/classcv_1_1VideoCapture.html#a473055e77dd7faa4d26d686226b292c1
-
-        :param callback: The function to callback the cv::mat frame to if required to be non-blocking. If this is left
-            as None, then the function returns a generator which is blocking.
         """
 
         # Reset the capture object
diff --git a/reolink_api/user.py b/reolink_api/user.py
index 68a3915..c382c2d 100644
--- a/reolink_api/user.py
+++ b/reolink_api/user.py
@@ -48,7 +48,7 @@ class UserAPIMixin:
         r_data = self._execute_command('ModifyUser', body)[0]
         if r_data["value"]["rspCode"] == 200:
             return True
-        print("Could not modify user:", username, "\nCamera responded with:", r_data["value"])
+        print(f"Could not modify user: {username}\nCamera responded with: {r_data['value']}")
         return False
 
     def delete_user(self, username: str) -> bool:
@@ -61,5 +61,5 @@ class UserAPIMixin:
         r_data = self._execute_command('DelUser', body)[0]
         if r_data["value"]["rspCode"] == 200:
             return True
-        print("Could not delete user:", username, "\nCamera responded with:", r_data["value"])
+        print(f"Could not delete user: {username}\nCamera responded with: {r_data['value']}")
         return False