Where is the information about esperanto?

The first was the French production Angoroj (Agonies) in 1964, directed by Atelier Mahé. It runs approximately one hour and its story involves murder. After a restoration and home video release (in the PAL format) in Switzerland, the film appears to be once again unavailable. Very little detailed information about Angoroj is available, except that the cast included some proficient Esperantists, including Raymond Schwartz, who was also associated with the Esperanto Cabaret in Paris.