I laughed when I watched that video...The same user uploaded another one ( by spamming the angel mode all the time) and sent it to Tameem on twitter. I also laughed with Tameem's response:
"We also don't have a fix for face-palming yur face until it bleeds"...
I can see Tameem's reaction, because that user was too much of a jerk and arrogant.
I think it's safe assuming that it's gonna be fixed until the release date.
At least, the glitch wasn't permanent like Darksiders 2...Darksiders 2 was literally hell. It's a 100% glitch game.
DmC on the other hand, seems to be enjoyable even with such bugs. However, that's a demo, so it's expected anyway.