Blow up iPhone screen on apple tv from macbook air
I recorded a July 4 fireworks display on my iPhone 6 and then transferred it to my macbook air by Airdrop. When I play it back on Airplay, either with Quicktime or iMovie, I get only the center portion of my tv screen showing the movie in the iPhone's aspect ratio. I want to fill the tv screen. I have tried the "match desktop size to airplay tv" option on the MBA as well as changing the aspect ratio to 4:3 in the Airplay settings, but no matter what i do, I basically get an iPhone sized and dimensioned image. Anything else to try, or third-party software that would do this? Would it make a difference if I connected the tv to the macbook air via a mini to vga accessory and a vga cable instead of wireless via airplay?
MacBook Air (13-inch, Early 2014), OS X Yosemite (10.10.3)