Hello GKyle840
I must disagree with the guys above. Only the static parts of the image are good and are of no interest. Your courier is completely blurred (maybe it's you). I have the same problem.
Pozzello/bigredfish have good advice but I don't want to add more light. The other thing to bear in mind is bit rate - it seems to me that although you set the frame rate to 15, you're only getting 8, perhaps because there just aren't enough bits of image data per frame. I like to use the maximum bit rate setting available, but perhaps because of noise in the image VBR doesn't help much.
As well as picking out alerts, I record continuously on nine cameras. To get 7 days storage with a 3TB drive, I only use 5 fps but because I record continuously I don't need to use an iframe of 5 (I think...) I assume the shutter speed controls how quickly the image is captured and a low frame rate gives the best chance of getting all the bits from A to B (although really I only have a shallow understanding). It's all a compromise.
Oh and I reckon cleaning the lens will do diddly squat.