Talks available in online videos:
A January 2005 talk on orbifold quantum Riemann-Roch by A. Givental at a Fields Institute workshop (audio only).
A November 2009 talk on Virasoro by A. Givental at a MSRI workshop.
A July 2011 talk on gerbes at a conference in Institut Fourier.
A March 2012 talk on gerbes at a BIRS workshop.
A December 2012 talk by C.-C. Liu on open-closed Gromov-Witten invariants.
A October 2013 talk on disks in toric manifolds at a Fields Institute workshop.
A May 2014 talk on Virasoro at a SCGP workshop.
An October 2016 talk on gerbes at Perimeter Institute.