Mathilde Kschessinska - Dancing with her Students in Paris c1920s?

It is possible that this is film of famed Russian Prima Ballerina of the Mariinsky Theatre in St Petersburg Mathilde Kschessinska (1872-1971) dancing. I have a feeling this may not be the case but I just can’t let go of the idea! Famed as much for her affairs with the future Nicholas II and the Grand Dukes Sergei Mikhailovich and his cousin Andrei Vladimirovich as for her dancing, Kschessinska obtained the title of Prima Ballerina in 1896 only through her influence at the Imperial Russian Court and against