Your video, Rattus's Exercise Video, may have audio content from The Bad Touch by Bloodhound Gang that is owned or licensed by UMG.
I was afraid this would happen, but I never found a song that suited the video half as well as that one. But I was bemused to see that it goes on to say that my video is blocked everywhere except in certain countries. I won't bore you with the whole list, but in addition to the Heard and McDonald Islands, it includes such copyright-hating countries as: Australia, Brazil, Canada, France, Germany, India, Ireland, Israel, Italy, Japan, Mexico, Netherlands, New Zealand, South Korea, Spain, United Kingdom and the United States. In other words, the video is still available in pretty much every country that counts. (If you're in a country where this video is blocked, please let me know.)
The message goes on to say that "No action is required on your part." I'm inclined to agree. It does mean I get some annoying advertising on and around my video, but it's better than having it blocked entirely, yes?