Sleep for 1-10 seconds after getting a channel's videos

ytnotifier.py

@@ -2,6 +2,7 @@ import re
 import sys
 import time
 import html
+import random
 import asyncio
 import logging
 import yaml
@@ -160,6 +161,7 @@ async def main():
                         else:
                             logging.info('Handling %s', video_id)
                             asyncio.create_task(handle_video(video_id, video_title))
+                await asyncio.sleep(random.randint(1, 10))
             if loadmode:
                 await save_seen_videos()
                 break