don't autoplay the tutorial video in quickstart (#76)

Author: badmonster0

docs/docs/getting_started/quickstart.md

@@ -12,8 +12,7 @@ This guide will help you get up and running with CocoIndex in just a few minutes
 *   Perform basic chunking and embedding
 *   loads the data into a vector store (PG Vector)
 
-
-<ReactPlayer playing controls url='https://www.youtube.com/watch?v=gv5R8nOXsWU' />
+<ReactPlayer controls url='https://www.youtube.com/watch?v=gv5R8nOXsWU' />
 
 ## Prerequisite: Install CocoIndex environment