Secrets of the Furious Five
I haven't seen it.

Secrets of the Masters (22:59)
IMDb; Universal; Wikia; Wikipedia
streaming sites: Google Play; Netflix; Vudu

In December 2011, this was released as a bonus DVD, along with Kung Fu Panda 2. In the short, Po gets Tigress and Mantis to break into a museum with him one night, apparently having told them it was an emergency mission of some kind. In truth, he just didn't want to wait in line when the museum opened in the morning. There was a cool display of Kung Fu memorabilia, mainly about Rhino, Ox, and Croc. Po told his friends a story about how those three had first met as street fighters, but were given a mission by Master Oogway, who wanted them to learn to work together... for honor instead of money. The mission was to defeat a trio of villainous sisters who had just escaped from prison, and planned to unite China's various criminal forces. It was a pretty decent story. And I guess that's all I can say.

Secrets of the Scroll
I haven't seen it.

Panda Paws (about 3 minues)
IMDb; Wikia

This was released on the DVD of "Kung Fu Panda 3". It features Mei Mei auditioning to perform in a spring festival, or whatever. There's a younger panda that keeps trying to upstage her. That's all I can think to say, but I guess it was reasonably amusing.