Exactly... I think they had too many people, too close and moved around WAY too much trying to keep the bear in the video. I suspect he heard them more than smelled them.
You can see from the brush and grass there was virtually no wind. Because there was no wind you can assume the warmer land is generating a small thermal effect (no breath seen in the video so the land is warmer than the water) creating at least some onshore "breeze."
