Cat In A Jar, Video, Cat Fits In A Jar, Video. I owe this post to my brother Nathan. I did not even know that cats did this till he told me about it. After I found the video on Youtube, I knew I should post it. This cat fits in a jar, but before PETA gets on to me, the cat gets in the jar on its own accord. It wants the applause of the crowd. This is pretty cool stuff. Please enjoy this, Cat In A Jar, Video, Cat Fits In A Jar, Video.