This is a hardware solution. Use a USB video capture card (e.g., EasyCap) and connect the composite output of the IT305WC (if available). However, the IT305WC is USB-native, so this is rarely practical.
Windows 10 blocks unsigned legacy drivers. To install older webcam drivers: intex it305wc driver windows 10
If the official link is broken or hard to find, try letting Windows do the heavy lifting. This is a hardware solution