Removing Subtitles

[Civilly Barbaric]

Not sure if this is really possible but, does anyone know how you can remove subtitles from a clip , so you can replace it with your own ? It's been bugging me for a while now can't find how.I think I've seen other you-tubers do it but not sure if its by removing the titles or what

 

[Cephus]

If the subs are hard coded, there's no way to easily remove them.