I originally thought that it seemed like she lived, but
this person's comments on Reddit gave me doubts, and now I don't know anymore!!
Masune said:
> That was her winter uniform. The cicadas were making sounds meaning that it's summer.
> We see the father burning incense. That combined with the fact it's summer suggests that it's Obon, a time when the dead come back to visit.
> His expression (or lack of) after watching the video seems to show that something serious happened afterwards.
> Most of the signs seem to point that she's gone, but it's left up to the reader to decide their own reality.