Almost all films free on YouTube:
Sherlock Holmes - Basil Rathbone - Complete Series
The missing Adventure of Sherlock Holmes
Episode 2 - Adventures of Sherlock Holmes (ENG)
PLEASE Contact if any of these are taken down.
Additionally these are mostly if not all available on Internet Archive and downloadable there, information on the Archive is below.
A list of all films with cast, crew and dates in order
https://www.themoviedb.org/collection/478628-sherlock-holmes-basil-rathbone-collection