Add video explaining website

content/welcome.md

@@ -14,6 +14,15 @@ We invite you to share your research, insights, and enthusiasm at IEEE VIS. In a
 [Kristi Potter](https://www.nrel.gov/research/staff/kristi-potter.html), National Renewable Energy Laboratory<br/>
 [Remco Chang](https://www.cs.tufts.edu/~remco/), Tufts University<br/>
 
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+This year, VIS 2024 is Virtual!  For tips on using this website for accessing content, including live streams, recordings, PDFs, and other associated content, watch the following video.
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+<div class="embed-responsive embed-responsive-16by9 mb-4">
+<iframe class="" width="560" height="315" src="https://www.youtube-nocookie.com/embed/GyZTB8_PAYs?rel=0" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
+</div>
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 Follow [@ieeevis on X (Twitter)](https://twitter.com/ieeevis), the [IEEE VIS page on Facebook](https://www.facebook.com/ieeevis), or [sign up to our mailing list](https://ieeevis.us20.list-manage.com/subscribe?u=874d4e627b4758f4438963e98&id=6c036e3c40) to keep up with conference activities and announcements.