Closes gh-94152: Update pyvideo.org URL (GH-94075)

The URL is now https://pyvideo.org, which uses HTTPS and avoids a redirect.
(cherry picked from commit 7c439dc)

Co-authored-by: partev <petrosyan@gmail.com>

Doc/tutorial/whatnow.rst

@@ -45,7 +45,7 @@ More Python resources:
   Particularly notable contributions are collected in a book also titled Python
   Cookbook (O'Reilly & Associates, ISBN 0-596-00797-3.)
 
-* http://www.pyvideo.org collects links to Python-related videos from
+* https://pyvideo.org collects links to Python-related videos from
   conferences and user-group meetings.
 
 * https://scipy.org: The Scientific Python project includes modules for fast