Exactly, and I think this is what the AC was trying to say in one of the earlier responses.
The headline seems as if it is trying to tie this story to all the recent reports of the agency actively weakening crypto algorithms.
It would have been insane to allow classified algorithms to be published along with TCP/IP (unless of course they were willing to declassify).
I didn't watch the video, but read TFA. There, Cerf is quoted to say:
1. “If I had in my hands the kinds of cryptographic technology we have today, I would absolutely have used it,”
2. “During the mid 1970s while I was still at Stanford and working on this, I also worked with the NSA on a secure version of the Internet, but one that used classified cryptographic technology. At the time I couldn’t share that with my friends,” Cerf said. “So I was leading this kind of schizoid existence for a while.”
Maybe he said it in the video, but in TFA he does not say "I wanted to use the classified technology in TCP/IP but the agency denied my request."
"Gort, klaatu nikto barada." -- The Day the Earth Stood Still