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Multiple video URLs let you link multiple videos to a single set of subtitles. Some example uses:

• Two versions of the same video exist on Youtube. You do not want subtitle volunteers to duplicate their work, so you add both versions to the multiple URLs pane.
• You put your video on Youtube, Vimeo and Dailymotion and you want the subtitles you make to work on all of those versions.
• You want to provide different versions of a video to different browsers (HTML5/Ogg for free software users, or HTML5/h264 to iPad users). If you add these URLs, our embed code will automatically fall back to whatever format is necessary for the browser.

Tip: double check that there are no timing problems.