Fast answer: you can use this font – http://www.dafont.com/bignoodle-titling.font, which is free for personal use. It is not the exact font from Overwatch, but very similar.
Detailed answer: so I heard you want to make a meme-video in an Overwatch style? You might want to use original fonts to style your article in a proper way. Unfortunately, original fonts are property of Blizzard and I can not share them with you. But if you google something like “Overwatch Fonts” it is quite possible that you find something similar to them and free.