@fourtonfish Hello, the complete documentation is here: https://api.windy.com/webcams/docs
If you cannot find a way how to achieve what you need, I am affraid there is no any "secret" way how to that.
The webcam you mentioned is not working even on our website: https://www.windy.com/webcams/1562900176
Unfortunately the error message is returned as the image of the webcam. Currently, we are not able to detect if the image is a real image or error image. The webcam stream we are using should return an error status code, but it does not :-(
Anyway, thank you for reporting invalid webcam, I am sure @Korina will look at that :-)