Update README.rst (pyvideo#1137)

* Update README.rst

* Update README.rst

* Add link to PyVideo

Co-authored-by: Sumana Harihareswara <[email protected]>

* Fixup rst formatting

---------

Co-authored-by: Amethyst Reese <[email protected]>
Co-authored-by: Sumana Harihareswara <[email protected]>

Author: 3 people

README.rst

@@ -1,7 +1,7 @@
 pyvideo/data
 ===========
 
-*Python related videos and metadata*
+*Python-related videos and metadata powering [PyVideo](https://pyvideo.org)*
 
 .. image:: https://badges.gitter.im/pyvideo/data.svg
    :alt: Join the chat at https://gitter.im/pyvideo/data