The raw space pizza footage even has the Gopro's audio from the little speaker looping the album: https://www.youtube.com/watch?v=gfGvVjEN1u8
After it fell back to earth, the local police in New Jersey were nonplussed and thought it might have been a terrorist device. The interview with Anamanaguchi on the topic is well done, but didn't surface after some quick DuckDuckGoing.
I think the vast majority of people on this site understand that balloons get "bigger" when rising in altitude. (quotes because the balloon is the same size but looks deflated closer to the ground)