Short episodes can be great because they pack a lot of content into a short amount of time. Good for when you're in a hurry or have a short attention span.
The ones that come to mind for me are:
- Yamishibai: Japanese Ghost Stories (6 minutes per episode)
- I Can't Understand What My Husband Is Saying (3 minutes per episode) - About an otaku husband and a normie wife
- THE IDOLM@STER CINDERELLA GIRLS Theater (3 minutes per episode) - Silly segments about idol girls
- RWBY (5 to 15 minutes per episode) - 3D fantasy/action