Update for June 29 webinar

Signed-off-by: Eric Poirier <eric.poirier@eclipse-foundation.org>
diff --git a/oxygen-content.json b/oxygen-content.json
index 0dd34e1..6d9ff9f 100644
--- a/oxygen-content.json
+++ b/oxygen-content.json
@@ -142,8 +142,8 @@
       "text": "Eclipse Sirius 5.0, All about UX",
       "time": "10am EDT",
       "speaker": "Mélanie Bats, Stéphane Bégaudeau",
-      "button_title": "RSVP",
-      "button_link": "https://www.meetup.com/Virtual-Eclipse-Community-MeetUp/events/239923903/"
+      "button_title": "Watch Now",
+      "button_link": "https://www.youtube.com/watch?v=EkLkhuA40zw"
     }
   ],