+ ack in footer

Note: I'm considering this a minor update for translations.
* Did not change date since content didn't change and don't want all translations to show out of date.
* Added to batch of low priority updates for translations.

index.md

@@ -14,7 +14,7 @@ github:
    path: 'index.md'   # Add the language shortcode to the middle of the filename, for example index.fr.md
 footer: >   # Translate all the words below, including "Date:" and "Editor:". Do not change these dates.
    <p><strong>Date:</strong> Updated 21 February 2019. First published 4 December 2017. <a href="./changelog/">Changelog</a>.</p>
-   <p>Project lead: <a href="https://www.w3.org/People/shadi/">Shadi Abou-Zahra</a>. Contributors: <a href="https://www.w3.org/People/Shawn/">Shawn Lawton Henry</a>, <a href="https://www.w3.org/People/Brewer/">Judy Brewer</a>, <a href="https://www.w3.org/People/yatil/">Eric Eggert</a>. Videographer and video editor: Ulrich Grimm, av-design GmbH.</p>
+   <p>Project lead: <a href="https://www.w3.org/People/shadi/">Shadi Abou-Zahra</a>. Contributors: <a href="https://www.w3.org/People/Shawn/">Shawn Lawton Henry</a>, <a href="https://www.w3.org/People/Brewer/">Judy Brewer</a>, <a href="https://www.w3.org/People/yatil/">Eric Eggert</a>. Videographer and video editor: Ulrich Grimm, av-design GmbH. Video clips developed with support from the <a href="https://www.w3.org/WAI/DEV/">WAI-DEV project</a>, co-funded by the European Commission. Translations managed with support from the <a href="https://www.w3.org/WAI/expand-access/">WAI Expanding Access project</a>, funded by the Ford Foundation.</p>
 # Read Translations Notes at https://github.com/w3c/wai-video-standards-and-benefits/blob/master/README.md
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