I'm not sure how to recognize robbing ... I watched a few youtube videos even and it wasn't entirely clear.
I have uploaded a video (quality isn't that good unfortunately) to my blog and I'd appreciate it if someone could take a look
The activity, whatever it is, was an anomaly. I watch the bees every day and have never seen this type of activity ... lots of bees (relatively) buzzing about the entrance. This was the day after I had freshened the sugar water. At mark 1:04 you can see a bee on the hive body getting repeatedly checked out. At 1:23 there are a couple of bees that are lifting their tails. As I understand it, this is done to mark "home". So is all of this activity actually just orientation flights and do the bees normally do the tail lift to help direct bees on maiden flights, or do they just do that all the time? Or was this a case of robbing ... I expected robbing to be a bit more dramatic, is it?