2016 Plenary Session Recordings
Saul Schleimer and Henry Segerman: Squares that Look Round: Transforming Spherical Images (Presented by Henry Segerman)
This is a spherical video. Note that you can drag around on-screen to change the view if you're using a laptop, but if you're using a phone or tablet you can actually move the device around in space and it'll track the changing view in real-time.
Judy Holdener - Immersion in Mathematics