It may be possible, but it depends on how the camera identifies itself when connected by USB. Cameras can connect as mass storage, PTP, MTP, or WIA devices. For real-time image capture/live use from a computer, the key point from the answers is that it would need to appear as a WIA device.

If the camera only shows up as mass storage, PTP, or MTP, it will typically just allow file transfer rather than live capture. Check your computer’s Device Manager (or equivalent system device listing) when the camera is connected to see how it is recognized.

If the DMC-SZ1 does not present itself in a way that supports live capture, then software alone is unlikely to add that capability. In that case, it may not be suitable for direct stop-motion tethering/live view from a computer.