The Intercept talks about accidental identity reveals, via data embedded into video calls, in relation to the ever-present videoconferencing tool. Video watermarking is to help you know who is sharing and talking during the call. Audio embeds the information of anyone recording the call into the audio. Video displays a portion of a users email address when someone is sharing their screen. Video of course being visual and so easier to spot than audio, and Zoom lets you know if someone shared it.”]
Source: https://blog.malwarebytes.com/privacy-2/2021/01/zoom-watermarking-pros-and-cons/