I've found numerous posts all over the internet about this issue, but no solution. I have an LG Viper 4G LTE (Sprint) that will play Youtube videos over 3G with no problem but as soon as I connect to Wifi the videos will get stuck loading and eventually say they can't be played. Everything else works fine through Wifi (email, web) and my Wifi is working fine on my laptop. This just started yesterday, I had no problems playing Youtube videos through Wifi before. Any ideas?