I don't think it did. No video when it was at the top
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I found a better video and it says it survived:
"This video contains raw footage viewed from the balloon, recorded with a GoPro action camera. The balloon flew for about a 100 kilometres from J?tk?saari, Helsinki, Finland to Artj?rvi, Finland in about 1,5 hours. The balloon was located with a GPS tracker.
The Lumia was as good as new when found, and restarted without a problem. In the end of the video the Lumia screen is foggy because of the fast descend, and the "scratches" are in fact clear spots as the result of hitting branches on the way down."
also it shows the landing