mirror-yt: Add a sleep between downloads

We want to play nice in the internet.

mirror-yt.py

@@ -1,6 +1,7 @@
 #!/usr/bin/env python3
 from pathlib import Path
 import subprocess
+import time
 
 import click
 
@@ -61,6 +62,10 @@ def download(allow_unknown, base_dir, channel_file):
         ]
         subprocess.run(cmd, check=True, cwd=target_dir) 
 
+        sleep_seconds = 5
+        print(f"Sleeping {sleep_seconds}s")
+        time.sleep(sleep_seconds)
+
 
 if __name__ == '__main__':
     download()