THE YOUNG GENERAL: REFLECTIONS ON MICHAEL REEVES (2022) is must-see feature-length documentary that also touches on the subject of film censorship (which always interests me).
I would have welcomed some focus on the director's personal life prior to him entering the industry - we get a little bit but more would have given it an extra boost.
This documentary can be found on the UK Blu-ray of 'The Castle of the Living Dead' which was released as a part of the 'Michael Reeves Limited Edition Film Collection' boxset. Certainly worth seeking out.