Cross-wiki media upload dialog, December 2015 A/B test option 1. See <a href="https://phabricator.wikimedia.org/T120867" class="extiw" title="phab:T120867">phab:T120867</a> for details.
The original form, with a single checkbox.
MediaWiki Developers
<span class="int-own-work" lang="en">Own work</span>