If you are using OS version 4.2 now you need to upgrade to OS 4.5. But not necessarily Video camera features will function properly. You must select OS version 4.5 is suitable. I encourage you to use the OS 4.5 version 22.214.171.124-126.96.36.199.
You can download here:
Change X to t
I hope your problems will disappear and you can use your blackberry is satisfied.