First we can see a female fly (<i>Anthomyia liturata</i>) (the smaller one with dark legs), and another Anthomyiidae, maybe an Hylemya spec. Then the female A. liturata flies away, and a male of the same species replaces it. Filmed at the Wollenberg, Hesse, Germany.
<a href="//commons.wikimedia.org/wiki/User:Pristurus" title="User:Pristurus">Pristurus</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>