Sorry, I had never joined a group at yahoo before.
I looked at the videos, and the first one was creepy at first.
Of course, the videos were too bad in quality to know what was going on.
Three things make me think it's a hoax though:
One: The object seems to be swinging as if it were suspended. It stays in the same general area. All in all, it didn't move like a "real" ufo seems to move.
Two: The ufo was dark. This makes it much more likely that it was just a dark or shaded object suspended.
Three: You seem to be videotaping from inside a house through a door to the outside. Much easier for someone to be on the roof or above the door to suspend something, in my opinion.
However, I don't rule out the possibility of it being something else.
it was interesting video none the less.
Edit: Actually, upon viewing the video again, I am even more sure it's a hoax. Unless there are some alternate explinations for these three things.