Add welcome video
<h1>Welcome to CBI @ Matchat!</h1>
+<iframe style="width: 100%; height: 25em;" src="https://player.vimeo.com/video/279408965" frameborder="0" allowFullScreen mozallowfullscreen webkitAllowFullScreen></iframe>
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<p>How many opportunities at conferences are lost forever because the people involved did not notice them? We're here to help!</p>
<p>Here, you post your needs, wishes, interests, offers - one by one. When they are matched with others, you can chat with them and see if it's one of these opportunities.</p>
<p>To get started, most users post about what they would like to do in the conference after-hours, others jump right in and offer a PhD position.</p>
