I rented Defiance season 1 parts 1&2 from playstation store, when I went to watch it said copyright wasn't correct. I think you (Sony Entertainment ) owe me a credit refund on this purchase, since I was not able to use the product mentioned.
This is a community forum, and while employees of Sony maybe here, they don't take complaints or requests here. It's just us and our fellow gamers.
To help though, first double check that your Vita is activated for video on your account. That sounds like the problem to me.
If you go there and your Vita (under the devices tab after logging in) is not set to play PSN video content, try activating it first. If it still insists that there is an issue, call Sony tomorrow and ask for customer support.