Not sure what I have done but the videos I'm taking on the p4p plus have all the sudden gotten blurry with a lot of zebra stripes/

Can you up load a video sample for us to look at.
Someone may be able to recognise the fault

If you have Zebra stripes, that is at an angle of 45 degrees, then that is the Over-exposure Warning. You can switch it off in the settings.

Alternatively, you can check whether the issue appear in the original pictures of the SD card.