Did you set your bait hive up with a frame of eggs and larvae, if so it could be the new bees coming out for orientation.
I did not see any bees exiting from the screen cone, but did see one go back in. Watch close it is right about the middle of the vid.
I actually did set it up just like that. However on the day I took the video I saw a bunch of bees exit the cone all at once (there had only been a trickle for a few weeks) so much so that there was a jam at the tip. By the time that I deployed the camera that
was all over except for the orientation flights or whatever you see there. So, I thought that was the queen and her few remaining retainers getting the heck out of Dodge. During the course of the trap out I did observe the occasional lucky (or smart?) bee that flew straight into the cone.
It turns out that after I removed the cone and saw the bait hive busily robbing the original hive and determined that the trap out was finished - I was wrong.
A week after removing the bait hive they were going back and forth like nothing had happened. So, I get another shot at it in the spring if they make it through the winter.
Since I'm doing it for the experience the home owner isn't upset. They want rid of the bees, and are willing to wait.
So, for now my trap out was a failure - although I did get a nice small hive of bees out of it - but if I can at all I'm gonna get those bees out of there for the home owner.
It's been a learning experience.