I've noticed on my second hive, a good number of bees are hanging out at the entrance, day and night. They seem to just be walking forward and backward. There are still foragers going out and returning, but I'm not sure what these bees are doing. It's not hot here (under 90 the last few days, which has been great), and they aren't fanning.
I took a video and you can see this most clearly on the right of the frame. Any ideas? I'm ready to do a general inspection of that hive, but want to look for anything that should concern me.