This reminds me of the 2021 Secret Sky online music festival put on by Porter Robinson. The 2020 one was similar but the 2021 version had little human-like avatars. Some other people and me were messing around with the browser console to do things like change our accent colours or change the location text above our heads to whatever else we wanted.

https://www.webbyawards.com/crafted-with-code/secret-sky-202...

https://www.webbyawards.com/crafted-with-code/secret-sky-202...