What a fantastic series of videos! This is why I love this site 😃

The whole Q&A is a must watch. There is some really interesting bits about THX 1138 at the end.

Gary Kurtz pronounces it as Thex and not saying the letters T-H-X. I think in the movie they say Thex as well.
Warner Brothers pulled the film shortly after release due to issues with Coppola’s Zoetrope and Kurtz says THX was making money at the box office. I never knew this.
35mm prints of THX were almost non-existent in 76 and you could only get 16 mm prints for screening.

Great stuff!