Some premium keys allow for local recording (check your local laws regarding consent). In the official app, a valid login key unlocks cloud DVR, letting you rewind up to 12 hours of footage.
: These sites may mimic the RealLifeCam login page to capture your real credentials. reallifecam+login+key
If you are searching for a to get free or cheap access, the answer is clear: it is not worth the risk. The vast majority of websites offering such keys are scams designed to steal your data or money. The official subscription cost is reasonable for the amount of content and the peace of mind that comes with legal, malware-free access. Some premium keys allow for local recording (check