Under twenty minutes
A Concerto Is a Conversation, Nǎi Nai & Wài Pó and The Barber of Little Rock.
Half an hour
The Only Girl in the Orchestra, Audible, How Do You Measure a Year? and What Would Sophia Loren Do?.
About an hour
Tesla, Pompeii: Secrets of the Dead and Sea Monsters: A Prehistoric Adventure.
The list
Open Short documentaries for all 30.