chore: add documentation RI

Code functionality left unchanged, only added docs where missing

close: N25B-298

src/robot_interface/endpoints/video_sender.py

@@ -7,6 +7,15 @@ from robot_interface.state import state
 from robot_interface.core.config import settings
 
 class VideoSender(SocketBase):
+    """
+    Video sender endpoint, responsible for sending video frames.
+
+    :param zmq_context: The ZeroMQ context to use.
+    :type zmq_context: zmq.Context
+
+    :param port: The port to use for sending video frames.
+    :type port: int
+    """
     def __init__(self, zmq_context, port=settings.agent_settings.video_sender_port):
         super(VideoSender, self).__init__("video")
         self.create_socket(zmq_context, zmq.PUB, port, [(zmq.CONFLATE,1)])
@@ -14,6 +23,8 @@ class VideoSender(SocketBase):
     def start_video_rcv(self):
         """
         Prepares arguments for retrieving video images from Pepper and starts video loop on a separate thread.
+        
+        Will not start of no qi session is available.
         """
         if not state.qi_session:
             logging.info("No Qi session available. Not starting video loop.")