I've seen several scientific bee vids like this before. More than likely this bee's antenna is a tracking device to learn how the bee flies out and back to her hive. Scientist's have learned that the bees eyes are faceted, like a diamond. The tracking device teaches how the bee memorized her journey everyday, how she gets to her field of flowers, and then turns around and makes it back home to just her hive, gets cleaned off from the other bees, and heads right back out again . It is said that the bees journey, or her highway, to her field of flowers is right down to an 1/8 inch on course from her last journey she just came home from.