Please let me know if this dtube video works well for you.
In case it shouldn't run smoothly even a few minutes after releasing this article I will add a Vimeo video for you.
Edit:
I added another video for the ones who are having problems with dtube. I recommend you to use full screen mode while watching it, as the butterfly is rather small.
Edit 2:
I also really have no idea why the second image (the dtube snap shot) is not shown correctly ...