Think i wanna macbookpro, need to recieve n broadcast live video

[Notacomputerguy]

my conundrum, i am self teaching myself about this computer stuff, my next attempt is to get a macbook pro i think. I want to use it in covering concerts, receive live wireless hd video/ broadcast to single big screen and also set up for replays. So far my understanding is I just need a software download to capture clips of the live video feed for replay. Is it possible to receive multiple wireless feeds, if so can i swap through those different feeds for live broadcast? Thanks much....Im an idiot with this stuff