I’d ridden it for two days without any problems and earlier today it started making this annoying noise.
How can I upload a video here? Or share it via YouTube?
You can post a youtube link if you mangle the URL, eg, change https to httpX
You should probably contact Zwift support. Persist with the chat bot telling it that whatever it suggests won’t work, and if you go on long enough it will let you open a support case.
httpsX://youtube.com/shorts/TlquRHCwIv8
httpsX://youtube.com/shorts/m-n3LnLlHdY
I noticed that the noise started when I used the heavier gears. After that it only got worse.
It does sound a bit like drivetrain noise. Is this an old chain? You can share these videos with support for their feedback, but I wonder if this is an old chain on new cog kind of problem. Do you have a chain wear checker that you can use to evaluate it?