Wrxpat

I just bought the gx85 and been testing out its video capabilities. I'm not too familiar with video, but I noticed for the first time while filming a kind of zebra like pattern that interrupts the whole image for a split second, repeating itself... What is this? Is it the camera telling me something is wrong with the video? Or is the camera defective? Here is part of the clip in question I used S mode in movie mode, with shutter speed 1/60 for 30fps. PL 15mm lens, sandisk extreme 64gb U3 sd card. In camera i see that problem, on computer as well (same player handled other clips from the gx85 no problems). The clip I filmed right after, with identical settings, literally 5 mins later, has no problem. The dozen clips i filmed since have no problems. Thoughts?