As of version 37(.0.0.0), removing, moving or replacing the intro video doesn't work as the audio still plays, don't know for other versions, also don't know how to provide any proof.
Topic on Talk:Call of Duty: Black Ops III
I know I'm answering really late but, version 37? Are you running a old version (or cracked) version of the game? We have been stuck on 5x.xx.x.xx.x.x (major.minor.patch, but no; not here)for ages now.
I'm super late as well; wouldn't at all if I hadn't come across these: https://www.mediafire.com/file/3lc7nbo1i8daozi/BO3ShadowVer.7z These are for shadows striping, also present on MW remastered; and yes, an old version, I was done with the game, finding a "solution" messing with config files, long before being bothered to post here.