Someone is sure having fun at YouTube today.

There is a prank going on. The big thing is that you don't see it until you view a video there. No matter what video you watch there, it will be upside down. Apparently, once you watch a video, even the YouTube logo is upside down, along with anything that has words.
So YouTube is playing a nice prank for April Fools.
For those that hate April Fools pranks, stay away from YouTube today. You'll hate this.

EDIT: Further research shows that this prank is only spotted if you click on videos that are "Recommended For You".
Best way to avoid it is to use the "Search" function. Do that, and you'll be fine.
