https://www.nytimes.com/2022/11/30/business/china-protests-censorship-video.html?smid=url-share
Videos filmed from different angles of the same event and tactics including using filters, recording videos of videos and editing several videos together can trip up censorship algorithms, according to internet freedom researcher Xiao Qiang and and a former censor.
Adding to the challenge for Chinese censors are accounts on Twitter and Instagram like @whyyoutouzhele@twitter.com. They can act as repositories for the videos, allowing them to be re-downloaded and reposted after they are deleted from the Chinese internet.