Ok, so yesterday I did my first hive check on both of my hives. Everything was great. However, today one of my hives seems to be agitated, while the other one is calm, happy, bringing in huge loads of pollen, etc. Here is a link to a video I made of the agitated hive. It is more apparent in person, but basically they are just buzzing a lot more, are moving faster, and flying around more in front of the hive compared to the other one. I can't tell if there is a robbing situation, and am wondering if something might have happened to the queen? Maybe this is normal, but it seems like something is wrong. I may not even think this at all if it weren't for the other hive being so mellow. Any advice would be greatly appreciated!
http://www.smugmug.com/gallery/12101694_jivyZ#860000140_xwPKJ
http://www.smugmug.com/gallery/12101694_jivyZ#860000140_xwPKJ