In order to see these, either as a Mentor or an ECT, you should navigate to your Prism dashboard. In the "Quick Links" panel on the right hand side, you should see the option to "Access recorded seminar sessions":
This is the same for both ECTs and Mentors, and it will take them to the page with all relevant seminars for their cohort.
This list of seminars will be added to throughout the year as they happen.