Strange Yellow Drone

I was shocked to see the Bees chasing this Yellow Drone. It was at the back of this hive trying to fly out of the observation window. I was carefuly looking at it to see whether its a Bumblebee but the lower abdomen is not hairy and is much like the normal Drone. Everything is Drone like except the Hairs are Yellow even between the eyes. I was looking at the hairs to see if that yellow is pollen but no pollen dust grains could be seen. Its yellow and working bees dont like it. By the way this hive is very aggressive today. I cant get closer more than 2 meters from the entrance without being attacked. Not sure if they have a Queen in there ... Hm ...
Here is the video and some bad photos;