Are you moving your camera? If so, you may have some connectivity issues at the mini-USB connector of JeVois. This connector was not designed for mechanical stress. Usually when we run demos, we mount the camera on a tripod and tie the USB cable to the legs of the tripod, so that there will be no mechanical stress or motion at the mini-USB connector. We have cameras running for months non-stop like that. I just confirmed that YOLO (1280x480 YUYV) is running fine and is not running out of memory, etc, it is stable here.
Also see other posts about freezing, in particular: you could also have a bad USB cable (we have had a few of those), or you can use some camera mount with strain relief, available on thingiverse.com (search for "jevois").