Judging from SIGGRAPH videos/presentations, it's pretty common for graphics researchers who are non-native speakers to use text-to-speech or a native-speaking a

Judging from SIGGRAPH videos/presentations, it's pretty common for graphics researchers who are non-native speakers to use text-to-speech or a native-speaking acquaintance for narration. I think it's done explicitly to help comprehension, although I think self-consciousness or fear of public speaking plays a role, too.