nginx mimetypes missing for webm and ogg

This bug was fixed in the package nginx - 0.8.53-1ubuntu1

---------------
nginx (0.8.53-1ubuntu1) natty; urgency=low

  * Merge from debian unstable. Remaining changes:
    - Don't copy the default site directly into /var/www/ in the package,
      but instead keep it in /usr/share/nginx/nginx-default and move it to
     /var/www/nginx-default/ just after installation. (LP: #547267)
  * debian/patches/nginx-html5-codecs.diff
    - Add support for html5 codecs (LP: #674224)

nginx (0.8.53-1) unstable; urgency=low

  [Kartik Mistry]
  * debian/control:
    + Added Michael Lustfield as co-maintainer
  * nginx.conf:
    + No need to use regex in gzip_disable for msie6, Thanks to António P. P.
      Almeida <email address hidden> (Closes: #592147)
  * conf/sites-available/default:
    + Fixed typo for "include fastcgi", Thanks to Mostafa Ghadamyari
      <email address hidden> (Closes: #593142, #593143)
  * debian/patches/fix_reloading_ipv6.diff:
    + Removed, merged upstream
  * debian/init.d:
    + Added fix to control nginx by user in a simple way by setting DAEMON
      variable to an invalid name in /etc/default/nginx. Patch by Toni Mueller
      <email address hidden> (Closes: #594598)
  * debian/NEWS.Debian:
    + Updated news for 0.8.x as stable branch

  [Michael Lustfield]
  * New upstream release (Closes: #602970)
    + 0.8.x branch is declared stable by upstream now
  * Add a UFW profile set:
    + debian/nginx.ufw.profile: Added.
    + debian/control: nginx: Suggests ufw.
    + debian/dirs: Add 'etc/ufw/applications.d'
    + debian/rules: Add install rule for the nginx UFW profile.
  * Moved debian/dirs to debian/nginx.dirs
  * Added types_hash_max_size to nginx.conf
  * Install simple default index.html file (Closes: #581416)
    + debian/dirs: Add 'usr/share/nginx/www'.
    + debian/nginx.install: Add 'html/* usr/share/nginx/www'.
  * debian/patches/nginx-echo.diff:
    + Added Echo module
  * Added files for nginx.docs
    - /usr/share/doc/nginx/
      + debian/help/docs/fcgiwrap
      + debian/help/docs/php
      + debian/help/docs/support-irc
      + debian/help/docs/upstream
  * Added files for nginx.examples
    - /usr/share/doc/nginx/examples/
      + debian/help/docs/drupal
      + debian/help/docs/http
      + debian/help/docs/mail
      + debian/help/docs/mailman
      + debian/help/docs/nginx.conf
      + debian/help/docs/virtual_hosts
      + debian/help/docs/wordpress
  * debian/conf/:
    + Removed excess spaces
    + Added tabs where appropriate
    + Added SCRIPT_FILENAME to fastcgi_params
 -- Bhavani Shankar <email address hidden> Sun, 28 Nov 2010 08:38:27 +0530

This has been resolved in the Debian version of the packaging. Here is the relevant piece from the bzr import of the svn branch.

timestamp: Sun 2010-11-28 05:49:49 +0000
message:
  Added html5 codecs support in mime.types, #605212
modified:
  changelog
  conf/mime.types