Viral videos, these days, seems to be controversial. Watch Logan Paul's content and you might be able to take some notes, haha!
In terms of makeup videos, I'm not actually quite sure. I suppose just trying to make something bizarrely different from the rest of the makeup content out there. And, to be honest, your chances of going viral with a video through a social media platform such as Twitter/Facebook/Instagram is far more likely than making it viral through YouTube. But no matter how worthy the video may be of viral status, algorithms are highly unlikely to go in your favour.
Forget about going viral and just focus on making content you enjoy making. People will enjoy that and you'll develop your audience. It's all upwards from there.