Upon going to https://mediaweb.ap.panopto.com/ NUS Staffs/Students can login to MediaWeb by clicking on the Sign In button on the Top right corner of MediaWeb and they will see the User Sign-In with the option selected as "Sign in with NUS Account" as shown in the picture below.
Once you enter the correct NUS domain, NUS user id and password, login, you would have successfully login as shown below with the top right corner indicating your NUS domain and user id.user name and NUS-ID with Provider: unified