Samanosuke said it pretty well
Saman said it really well. This is more of the same.
I watched the first video, and said "Hey, that's pretty cool!" I voted 5.
I watched the second video, and said "Still pretty interesting!" I voted 4.
I watched the third video, and said "Well, the roar was cool, but this is the same thing..." I voted 3.
I watched this one, and said "Nothing's changed." I voted 2.
It was a good idea, but there are four of these now, and they're all the same. You could have just as easily condensed this into one entry and no one would have known the difference. Also, like Saman said, flashers can create amazing works (and you have), but they aren't godly.
These are good works, don't get me wrong, but innovation is the key here. And basically nothing's changed in four entries.