OK OK OK Hold on.
Let's stop for a second here.
Rachael, you've made a video that lots of people like and it has done very well in the contests you have entered it into. You should be very very proud. Well done.
Now, I know that people may feel cheated if, in future contests, you win again... basically because the video has received its recognition and it is unfair on other people who are entering. The usual sort of analogy is "How would you like it if you worked hard on a dance video and Odorikuru was entered into the contest and won... again."
Obviously, you didn't know that you were going to win, and that's fair enough. You weren't to know. I guess the sporting thing to do when you've won lots of awards is to contact the cons that you've submitted to and ask them if it can be a non-competing entry.
It's not your fault, you're a victim of the video's sucess
Just be aware that people may get irritated if you go on to win at another 3 contests.
You haven't broken any rules - if anything, the cons should be a little more specific about videos that have been entered into other contests. One thing I will say is that next year you may see a rule that would stop you from entering into this many contests. Sorry ^^;;;