adding embedded recording to seminar page

web/content/seminar.md

@@ -26,4 +26,12 @@ Next to providing dedicated space for audience members to ask questions to the p
 
 The Open Book Futures project is funded by the [Research England Development (RED) Fund](https://re.ukri.org/funding/our-funds-overview/research-england-development-red-fund/) and [Arcadia](https://www.arcadiafund.org.uk/), a charitable fund of Lisbet Rausing and Peter Baldwin.
 
-![logos for Research England and Arcadia](/static/images/funder_logos.png)
+![logos for Research England and Arcadia](/static/images/funder_logos.png)
+
+## Previous seminars
+
+### Sesson 01: Manifold
+
+<br><iframe src="https://archive.org/embed/Experimental_Publishing_Seminar_01" width="640" height="480" frameborder="0" webkitallowfullscreen="true" mozallowfullscreen="true" allowfullscreen></iframe><br>
+
+View the whole recording on the Internet Archive: [https://archive.org/details/Experimental_Publishing_Seminar_01](https://archive.org/details/Experimental_Publishing_Seminar_01)