I called DJI today and they told me they're working on this problem... a temp solution is to use the normal color mode, do not use any other profiles in the meantime.
I just talk to DJI support and they told me that they're working on the fixing the video blurry issue... a temp solution is to set the color mode to normal.
Same here... i reformatted the SD card and did a reset in the video setting, it help but still blurry.
I noticed that when in Photo mode, previews look blurry too, but when i open them in photoshop they look fine.