I really love seeing people try out new things and I'm not a professional at all. I'm currently running my own Kickstarter and I made a lot of mistakes which I can't fix now that I am live. I want to offer you some constructive feedback that is no way an insult to you personally. It's all about learning.
For the video:
You have about 5-10 seconds at worst and 15-20 seconds at best to capture the audiences attention IF they click your video.
The thumbnail on your video was very intriguing and got me to click, however, the video took way too long to reach the punch line. 20 seconds and you just finished the intro. I would watch a 20 second intro if it was intriguing but it seemed more like an infomercial. The only reason I stuck it out was because you asked for feedback.
At 45 seconds - that is when you actually introduce the product. This drove me a bit insane. I also didn't like watching the hand writing the letters over and over, I was screaming "cut to the chase!"
It's not a bad creation though... simple and sweet. The look could be spiced up a little to make it more aesthetically pleasing but that's okay. The thumbnail for your video looks awesome but when you show it on the Kickstarter page it looks super bland -
vs.
I know that the last one is a 3d render but it does look pretty slick. If you could get the real version to look like that man.. that'd be awesome.
I feel like there were too many pledges. I had to scroll forever to get to the actual pledge that had the holder in it... 10 euros isn't a bad price for that though, very affordable and cheap!
Hope this helps! Good luck!