Conversation so far:
What media platforms is the film on?
there are a multitude of poor quality DVDs with different edits, scores, running speeds and usually in definitely unoriginal black and white".
Which is the official version recorded on?
35mm print that was the source of Shepard's 16 mm print.
Where is the original now?
Museum of Modern Art's.

Question: How has the film been restored since?
Self-contained rewrite: How has the film The Birth of a Nation's been restored?