According to the provisions of the Civil Law of People's Republic of China (PRC), citizens' personal information is protected by law, and no organization or individual may illegally obtain, use, disclose or sell citizens' personal information through a third party. Shooting other people's videos without authorization and making them public without authorization have violated the personal privacy of others. So you have the right to protect your privacy through legal means.
I suggest you try to communicate with the clerk first, and ask him to delete the video and stop making it public. If no agreement can be reached, you can complain or sue the infringement to the relevant departments or lawyers. While proving the fact of infringement, you need to provide enough evidence to prove that the behavior of the clerk has violated your privacy.
Finally, in order to avoid this kind of infringement, you should carefully choose reliable merchants in the process of car purchase, and negotiate with them to reach a clear car purchase contract and privacy protection agreement. At the same time, if a merchant requests to collect or use personal information, it must be fully understood and carefully considered in advance.