He did not ignore C, he said C++ is much easier to maintain and lets you use friendly features when it's not performance expensive. They use template as much as possible over macros, C++ debuggers, lambdas, ref counting.
I haven't watched the last 10 minutes yet, but there's no mention of C in the talk before that. The only comparison is to Assembly.
And I can't really rewatch the first half hour, but I distinctly remember he mentioned C at least two times at the begging, slightly before and during "Why C++" part. The examples of template usage also imply things not possible in C.
I watched it last night and can confirm that C was not explicitly mentioned once.
Wow, I guess I must have filled in some blanks... when he said 'other languages' or something...