Fantastic time lapse photography of cactus blooming!
It was created by Greg Krehel, a.k.a. Echinopsis Freak, who has very nice web pages at http://echinopsisfreak.com and http://echinopsis.com, also a Facebook page at https://www.facebook.com/echinopsisfreak.
The video can also be watched on YouTube at https://youtu.be/_hwDdE0Gu4E.
If you are not on a mobile you can improve the resolution by clicking on the gear in the lower right corner and selecting the highest quality your screen can handle. Then click on the square thingy in the very bottom right corner to make it fullscreen. You need to restart from the beginning of the video to activate a new resolution.