Finished. Was a pretty good video. I did a write-up of it below on Schneier's blog to justify eliminating C because it's provably Bad by Design. All due to limitations of the PDP's and, new to me, the EDSAC. Also more of a rip-off of BCPL than I thought before.
History and Spirit of C and C++ @ NDC 2015
https://vimeo.com/132192250