Great video, especially for the first time.
From what I know about birds, you were a little lucky they were more interested in the 2 deer on the ground than the little annoying buzzing by the Mini. Raptors can snag and destroy your bird without a scratch to them. But, that was a great video. Before you fly over water this Summer check some the threads here on sensors and low level flying. Again, great video. Good luck. Can't wait to see more this Summer.