Thanks to @buzzymultimedia for tweeting their link!
Abbie Bernstein interviewed Keanu Reeves and Justin Szlasa for Buzzy Mag. The interview took place at the Beverly Hilton Hotel after the PBS Side by Side panel and includes some new info.
A variety of topics were covered including Justin Szlasa detailing the editing process that was used to create the debate. He also discussed the production constraints that they had to deal with. It was a good read.
The piece is here. Also according to the article some of the PBS affiliates will be airing the 90 min version of the documentary instead of the 56 min version.