I've looked for an answer to this but still haven't found one that works.

I want to use my iPhone as my primary source of internet. I am currently an ATT Uverse DSL customer, but I want to cut the cord and use our current DSL modem/router, the one and only Motorola NVG510 for it's wireless signal only so that my wife and I can airplay from our phones to our Apple TV.

Is it possible to use our Cell Data to stream a video and then airplay that streaming video to our Apple TV at the same time?

*Using the iPhone as a hotspot is not an option.

Any help is greatly appreciated!