I've had the phone a week and have restarted it fewer times total than you did yesterday. I haven't made any videos but my photos upload silently in the background like they're supposed to. I've had no connectivity issues and the browser seems fast enough. For the most part, everything just works. Is your WiFi and LTE connection generally good and stable for other devices? I'd say cause for concern. . . maybe a factory reset and a clean slate would rectify things or maybe you got a device with a defective radio or something.