The Short Life of Anne Frank includes a video of which second son of Alice Betty (née Stern) and Michael Frank?
The Short Life of Anne Frank:  The film includes the only known footage of Anne Frank (taken in 1941), a video of Otto Frank in English (taken in the 1960s), and some pages from the original diary of Anne Frank are also videoed in the film. Otto Frank:  He was the second son of Alice Betty (née Stern) and Michael Frank.
Otto Frank