I agree that the insurance company has a right to regular inspections to spot potential risks and take action before something happens. But they should then come up with a solution rather than cancel the policy. If they told the homeowner to clean up the backyard or they will have to increase the policy/cancel it then that would be acceptable. But letting insurance companies cancel whenever they feel like it makes no sense and defeats the purpose. What's next? Flood insurance cancels your policy because heavy rain is expected?

But they definitely should have to schedule a time for the inspection. No one should be able to just film your backyard whenever they feel like it. There are tons of things one might do in their backyard they don't want others to film.