Default Unable to stream video

So i got my g3 this monday, and I really love it, exept for the fact that I have been unable to stream videos. Youtube (both app and via chrome/browser), vimeo, snapchat; non of these work.
I am however able to play recorded videos.
Sometimes the app shows an error, sometimes the picture freezes but the audio continues and yet sometimes the phone resets.
Has anyone had similar issues/ have any idea what to do? Really don't want to return it, so that will have to be a last resort.
Not rooted, recently reset.