Why Isn't YouTube Working On My iPhone 5?

So I got a new phone about 2 weeks ago and YouTube works only sometimes like yesterday it was working perfectly fine, and then boom! Today it wasn't. Any suggestions/help?
My network is tmobile.

Don't view YouTube on Safari. Download the YouTube app.

  • Youtube isn't working on my iphone? Usually it would disconnect the Wi-Fi mid video and I 'd have to go into settings and re-select my router… But now it just doesn't even load videos, it's not disconnecting from the Wi-Fi but when I select any video it just comes up with a playback error! The comments load, the description loads, the searches are fine but the videos don't play. The 'popular' homepage foes not load either. It's really pissing me off, how do I fix it?
  • Why isn't my itunes/youtube app working on iPhone 5? Ok so my iTunes andYouTube connection aren't working on my iphone. It keeps saying "loading" and when I seach something it won't load. I think my internet connection is down. How can I fix this?
  • Why isn't YouTube working for my iPhone? It loads everything else like the comments, description and other to watch videos but the video won't seem to load whether it's on Wi-Fi or on 3G.
  • Why isn't Wi-Fi working on my iPhone? 3G works (that's what I'm using now) but Safari or anything else that uses internet won't load when I use Wi-Fi. Why won't it work?