I know this is an old thread, but I just ran my 5Dsr through my favourite video Moire/Aliasing horror test and it completely rocked it. Both my GH3 and GH4 do appallingly at FHD (presumably due to skipping about a third of the pixels) and only the GH4 does well at it when in 4k mode. I haven't done a rolling shutter test yet, but if it really reads the whole 16:9 crop of the 50MP sensor (8688x4888 = 42.5MP) to make the video I imagine it won't be great (buy hey, bolt on a faster CPU, add a small crop and you have 8k, hmmm). I don't think there is enough control to make it a decent video camera (I certainly didn't buy it for that, I have a particular use for a hi-res stills camera), but right now I'd dispute any moire/aliasing assertions. (If anyone is in London one of my tests, although I have a few, is shooting through Tower Bridge from upstream on the South Bank with Canary Wharf about in the centre of the Bridge. The Windows in the building closest to the water on the left and the sky-scrapers are the interesting bits. I usually frame to have a 1+ to 2 Tower's widths either side of the Towers.)