I can't be sure what happened to the video camera, either it wasn't connected correctly at the start or when it hit the ground on launch may have caused it to dislodge the power connector. This would've caused it to turn off.
For the antenna that's for an expert to look at, as detailed before it looks like it could either be the connection to the board or the antenna material caused it change shape during the flight. This can be tested but it would require long range as testing it close up has good results. Other theories welcome.
Picture will be posted later on.