videoQuota: Add usage

config/scripts/videoQuota

@@ -1,5 +1,13 @@
 #!/usr/bin/env python3
 
+# Compress a video to make it fit under a certain size.
+# Usage: videoQuota SIZE SRC DST
+# SIZE: destination video size in bytes
+# SRC: source video file
+# DST: destination video file
+# Example: videoQuota 20971520 source.mov dest.mp4
+# To make a ~20 MiB MP4 of a MOV video
+
 import sys
 import subprocess
 import logging