Add description to new example. Swap import on original example

examples/download_motions.py

@@ -1,3 +1,4 @@
+"""Downloads all motion events from camera from the past hour."""
 import os
 from configparser import RawConfigParser
 from datetime import datetime as dt, timedelta

examples/streaming_video.py

@@ -1,5 +1,5 @@
 import cv2
-from reolink_api.Camera import Camera
+from reolink_api import Camera
 
 
 def non_blocking():