Jill, while in bed at night Facetimes Justin in France and Justin answers while climbing at the top of a mountain in broad daylight. With the time change difference France would be 5-6 hours ahead of Boston so it would be the middle of the night in France.
About 50 minutes in you can see the reflection of a cameraman in a window as they walk down a street.
About 13 minutes 35 seconds into the film you can see the microphone.