Shadows - The Witch Bottle (1975)
Shadows was a British supernatural television program from the late 1970's. I'd never heard of it before stumbling upon this little gem of 70's occult cool via a weird late night Youtube binge. This episode tells the story of a brother and sister who become drawn into the legend of a witch put to death during "the burning times." It was written by Stewart Farrar.
The other episodes were fun too, and it seems the series was marketed towards children or at least Young Adults.