From what I can gather, you need to be registered to CVPR first before being able to to join the virtual platform. They haven't sent the details yet on how to login or what website to go to in order to login. If I understand correctly what they distributed to organizers, you will need the registration code provided in the email confirming that you're attending CVPR as the password for the event site.
Lastly, I would advise anyone who has issues logging on Zoom from their company's devices, to try their personal devices. I will definitely be doing this myself due to the same reason as Pei You mentioned.
The workshop schedule is as follows --- All time are US Eastern (EDT):
15:00 - CLIC 2021 Opening Remarks - George Toderici
15:30 - Invited Speaker - Joao Ascensco (University of Lisbon)
16:00 - Invited Speaker - Kede Ma (City University of Hong Kong)
16:30 - Invited Speaker - Rianne van den Berg (Google)
17:00 - Sponsored Speaker - Federico Perazzi (Facebbok)
17:20 - Panel Discussion
17:50 - Awards Ceremony
17:55 - Image Track Winner - Jing Wang (Huawei)
18:05 - Video Track Winner Talk - Pierrick Philippe (Orange)
18:15 - Perceptual Metrics Track Winner Talk - Yanding Peng (UTSC, China)
18:25 - Poster Session
19:00 - End of the workshop
If there are any errors with the affiliations, please email me so we can correct them.
We will update the compression.cc website with this schedule hopefully soon-ish.