The "joke," Dave, is that it's basically just a digital representation of someone who can do this:
One of my favorite things to do when at WDW is to sit outside of Casey's and wait for Jim to arrive and start playing (this is not one of my videos of him).
The salamander embryo (an Ichthyosaura Alpestris) was followed very closely in a combination of timelapse and film. All stages of embryogenesis can be seen in this film: cleavage, gastrulation, neurulation and organogenesis. Time was condensed from about 3 weeks to 6 minutes.
I don’t know if this has been mentioned, but search “car stereo hair trick” on YouTube. Funny stuff, but you have to wonder how many people are going deaf.
Another really funny one is “drive thru headless prank”. Hysterical.