The social media giant vows to appeal against the Brazilian Supreme Court ruling.
Capacity has been halved at the venue, with performers now wearing masks and sitting further apart.
US General Manager Vanessa Pappas defends the Chinese-owned app as President Trump threatens to ban it.
Several options exist, from preventing Google and Apple offering the app, to blocking its servers.
Filming was supposed to restart in July but was put on hold two days before it was due to start.
US security officials fear the Chinese-owned app could be used to collect Americans' personal data.
The night's big highlights, from DIY trophies to Kermit and Miss Piggy.
Gaming gives the 22-year-old a second chance of achieving his real life racing dreams.
Watch the highlights of a very different Bafta TV Awards, where awards were accepted virtually.