If you cannot get your video to a wifi uplink; you will eat through your data very fast on your phone.
I speak from experience. Each carrier tower (a cel phone on a carrier only connects to a single tower at any given moment), is a standard T1 line.
One phone will not be enough, if call volume spikes; your uplink bitrate will be bottlenecked by your carrier.
The solution; if this is a serious project, is to build a streaming cel phone package. You want to use rather than phones, the 4G hotspots, which have both USB and wifi connectivity. Although phones work too.
Then you want a product like the Cradlebridge Bandsteering Router, powered off a portable 12v battery source.
The Cradlebridge Routers can use multiple network connections; my unit has 2 USB and 4 CAT5 + Wifi, which it can then, use multiple uplinks; steer the data, and make sure it gets there in the correct order at the right time. Literally, switching between your phones from say ATT, Verizon, Cingular, Sprint, etc; in case you get sqeezed off one or more of your uplinks.
At best-- best... you can expect a consistent 150-200kbps uplink on a single cel line over the LONG run. Thats not to say small uploads and videos don't go up in a snap, but a long run game... you will get squeezed out bandwidth wise. Again, doing a 20 second speed test is not going to give you realistic results for long uploads. The tower on one carrier will allow a burst, fast upload, for say 30 seconds, but then watch it drop.
So you tether 4 carriers together, each carrier will be working of a separate tower... and then use LiveStream to broadcast.
It's harder, and more frustrating, than you would think.
Lastly, do the math, on a single cel line at 200kbps x 1 hour... how many GB will you go through? Unless your data is unlimited.