I got the message that the driver is not compatible with my current system. I have risked a download of 'Labtec WebCam 10.5.1' from, it is clean according to Windows Defender, and the installation menu plausibly refers to Logitech. The most recent and last driver that still worked on Windows ME was probably 'Labtec WebCam 10.5.1', see, which would be based on Windows 98 ))))
The last driver I accidentally see during short research is for Windows ME (and probably not available anymore, and offered on strange driver websites which I would rather not use at all). When plugged in, the device is understood as 'Camera', but I cannot get the driver automatically.